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Cnc head porting of Technology
Well-Known Member. Many of you may remember a review, and a flow test done by Eric Weingartner on his youtube channel of a pair of CNC ported 440source heads. Seeing that, I instantly thought it would be cool to see how the ported Iron would fare. It would also be great to see how it compares to previously tested Stealth, RPM & Trickflow heads ...CENTROID ENGINE SHOP CNC Machining Center. 3 Machine tool in 1. CNC port cylinder heads and Blueprint and CNC machine engine blocks AND produce all kinds o...PRC CNC Porting Service - Cathedral Port Heads (Customer Supplied Castings) $ 899.99. PRC LS3, L92, & LSA CNC Cylinder Head Porting (Customer Supplied Castings) $ 899.99. PRC LS7 265cc 7.0L CNC Head Porting $ 1,081.99. PRC LS3 Aftermarket 6-Bolt 260cc CNC Cylinder Heads $ 2,709.99. Military And Law Enforcement Discount .A little behind the scenes action on what goes into CNC and porting heads at our shop. Check it out!ls1 complete cnc ported heads, these heads flow 594hp. they also have a great exhaust to intake percentage of 88%, which is a great asset for cars with full ...Specialists in cylinder head and intake manifold CNC porting, designing, manufacturing and machining for late model street and race cars. 832-619-1622 7413 Wright Rd. Houston, TX 77041Shocker SBF Modular CNC 4.6/5.4 2 valve. (Sold in Pairs) $ 1,600.00 - $ 2,180.00. The 2 V 4.6/5.4 SBF Modular CNC ported heads feature a unique NEW casting that fits both the Windsor and Romeo platforms. This new casting is CNC Ported 185cc to make up to 50 Hp over stock heads. Valve Option.After porting, the 906 heads flow an impressive 313.1 cfm on the intake side and 223.5 cfm on the exhaust side at .600-inch lift. Using the rule of thumb that cylinder heads have the potential to ...The heads are available with 67cc, fully CNC-profiled combustion chambers with stainless steel, 2.080-inch (intake), and 1.600-inch (exhaust) valves. The competition-ported runners on these new CNC-ported Super 23 215cc cylinder heads measure 215cc (intake), with 78cc (exhaust), and through modern engineering, create the best-flowing high-lift ...CNC machining strategies that work! Tabbing 5th axis parts can be done many ways and it all depends on the part you need to make and the end results you want...Engines need air (and fuel and spark). Moving air efficiently through the combustion chamber has a huge effect on power and porting your heads is one the bes...o CNC Porting - Occasionally a 100% CNC ported head might have a very small area left "as cast", this in no way affects performance. o Valve Spring Installed Heights - FED valve spring installed height spec is +/- .015" which is the smallest shim available for adjustment. This small of a difference will have no issues and should be of ...• Machining of front of cylinder head • Additional 5-axis CNC porting • Full radius venturi valve job • Larger exhaust valves • Full stainless exhaust system with megaphone ... $2150 With receipt of cylinder head. Carpenter Racing: 856-753-1555 : Head Porting • Services • Sportbike Packages • Products • Projects • About Us ...Specializes in 5-Axis CNC Porting, Custom Machining And Cylinder Head Service : Interested in More Information? Want Performance CNC to assemble a complete head package suited to your racing application? Call or Email Us Today. Phone: 888-797-3773 / 843-873-4076. Address: 131 Elliana Way Suite A ...A fully dedicated fast and easy to operate 5 axis cylinder head porting machine as well as an optional package for our F60 Series machines. Both utilize the same specially designed, easy-to-use software. The entire programming process can be done at the machine. 5 Axis CNC Port Exhaust Port, Intake Port, Combustion Chamber & Intake Manifolds.CNC porting is also becoming a more affordable option, a Centroid 5-axis CNC machine like the one VAC Motorsports uses for porting BMW heads becoming a more commonly seen tool at higher end shops. The beauty of the CNC approach is accuracy, repeatability, and speed, so once a shop like VAC has their CNC program …CNC Head Porting from CT Performance. CT Performance is happy to announce that we will be unveiling our brand-new 5-axis CNC machine with the launch of our new facility later this year. A CNC machine—or Computer Numerical Control machine—is a pivotal step for the CT crew because it will allow us to tool and machine parts in house.A fully dedicated fast and easy to operate 5 axis cylinder head porting machine as well as an optional package for our F60 Series machines. Both utilize the same specially designed, easy-to-use software. The entire programming process can be done at the machine. 5 Axis CNC Port Exhaust Port, Intake Port, Combustion Chamber & Intake Manifolds.And once you've hand ported a 2 stroke single and flow tested a good shape, you've negated the need for cnc porting. But it would but good to have all the good port shapes as cad files. 03-02-2010, 04:19 AM #17CNC ported DOVE,D3,87-92 E.F.I.,RHS HEADS. We have developed CNC ports for these cast iron heads.if you want to save some $$$ with stock ported heads and still make respectable power than this might be your answer.they range in flow from 340-375 cfm intake and 220-250 exh.with 290cc port volume.they have 2.250/1.760 valve sizes. we even built a ...MHS 4.6L / 5.4L 4V Stage 4 Competition CNC Porting Package -This is for 03/04 Cobra / Mach 1 Heads only. For GT500 Heads, please see our GT500 specific packages. We do NOT port "B" Heads or 99/01 Cobra Heads. This is the Ultimate Porting Package for 4V Cylinder Heads. Stage 3 Porting Program, Oversized Valve Seats, Bronze Valve Guides ...Fuel Moto Level BX CNC Cylinder Head Porting (new for 2023!) Available for both air cooled and twin cooled H-D models, the Fuel Moto Level BX CNC cylinder head is a top performer; it works especially well with 103", 107", & 110" builds for an excellent combination for torque & horsepower. Extensive CNC porting offers unmatched consistency and ...CNC Ported Dart Iron Eagle Head. We have several intake port designs for the 200cc Dart Platinum cylinder heads ranging from 205cc’s to over 230cc’s. The port on the left matches the Fel Pro 1289 Fast Burn gasket. This is our “Super Model” port ( because it’s tall and skinny). This port will match the Edelbrock 2814 intake manifold.CNC Ported Cylinder Heads. Showing 1–16 of 56 results 225 Twisted Wedge R Call for pricing; 235 Twisted Wedge R Call for pricing; 240 Twisted Wedge R -SC Call for ...Nearly everything you use in your life was touched by a CNC machine tool. Don't know what a CNC machine tool is? We'll explain. Advertisement A computer numerical control machine (...VAC has been offering BMW port and polish cylinder head services for decades now. In June of 2013, we added a Centroid A560 Block and Head CNC Machine to our arsenal of CNC equipment. Now most of our cylinder heads are CNC ported to perfection. The list of BMW CNC heads we offer is broad and consists of applications for: M20 cylinder heads (E30 ...HEMI CNC Head Porting Service by MMX. SKU: MMP-PORTING-SERVICE. Dimensions: 26X24X12. Weight: 75.0 lbs. E-mail this product to a friend. **Please check local and State laws for emissions compliance before purchasing this product**. *Send In Your Heads Options. I Am Sending Clean Heads Less Valves for Porting Only.PRC LS3, L92, & LSA CNC Cylinder Head Porting (Customer Supplied Castings) $ 899.99. PRC LS7 265cc 7.0L CNC Head Porting $ 1,081.99.Cylinder head porting is an advanced area of car tuning, ... Once happy, the port can then be digitally scanned before the programme is loaded into a state-of-the-art CNC machine. The incredible accuracy of the CNC machine ensures that all ports are exactly the same shape and design. Therefore, they will flow exactly the same amount of air.243/ 317/ 799 CNC Cylinder Head Porting Service $ 900.00 – $ 1,470.00 Select options; LS7 CNC Cylinder Head Porting Service $ 950.00 – $ 1,480.00 Select options; Small Bore CID LS3 $ 3,875.00 – $ 4,315.00 Select options; Brodix LS7 285 $ 3,500.00 – $ 3,740.00 Select optionsWe offer three levels of CNC porting service for Twin Cam Heads: The Impact service treats your heads to our exclusive and proven 4-Axis CNC port treatment, followed by hand finishing, bronze manganese valve guides, a custom radius valve job, sizing of the chambers to achieve your desired compression ratio, and decking your heads to get a ...Total Engine Airflow is a full service cylinder head machine shop. Standard Shop Labor rate $75.00 per Hour. Custom Serdi Valve job $175.00 and up. Grind seats, margins,backcuts on valves $2.00 ea and up. Remove and replace valve guides $4.00 ea.5 Axis CNC Head Porting Service. At Direct Motion, we use our own machine tool control technology in house for 5 Axis Head Porting & Digitizing. We are the largest, most effecient, and accurate CNC head porting operation in the world. We have 23 years of experience in CNC porting and port 100s of heads weekly. Fixturing, digitizing, modeling ...A new stock Chevy “Mexico” Vortec head will flow in the 210 to 215 cfm range on the intake and about 145 cfm on the exhaust. After our “CNC – UnderCover Porting” the Mexican Vortec head will flow in the 235 on the intake and 165 on the exhaust.Center bolt cylinder heads. Lingenfelter offers a CNC ported version of the LS1 style aluminum cylinder head used on the 1999 - 2007 5.3 L aluminum truck cylinder heads. The port and chambers are carefully designed to provide the best combination of high flow capabilities and improved port velocity. This combination provides excellent horsepower …Originally Posted by Clarkstar. I disassembled mine, took them in bare and they cleaned, ported, valve job, measured guides, clean pass on deck surface for $500. I lapped the valves, measured/ shimmed springs and reassembled my self. $25 for lapping compound and tool.CNC Head Porting. Very hi-tech. Great work. 5yporting a set of Victor jr. ;Well let's start off with I'm building 427ci sbf that going in to a 3100lbs car who has the best program for Cnc porting these particular cylinder heads victor jr . Using a hyd roller cam Duration @ 50 260/270 gross valve lift is 0.624 using a victor Jr intake with a pro SYS carb ....LS1 LS6 243 / 799 Aluminum Cylinder Head CNC Porting Service ( Customer Supplied Bare Heads ) CNC Ported LS1 243 / 799 Cylinder Heads, Customer Supplied Bare Casting heads. $599.95. Options. Valve Job with new Valve Guides + $400.00. Resurface for MLS Gaskets + $150.00. Cylinder head Assembly + $150.00.LS2/LS6 CNC CYLINDER HEAD PORTING. 313-561-5500 Log In Register Account Products. Air Induction. Apparel & Gear. Cam Phaser / DOD / VVT Repair. Computer & Tuning. Cooling. Engines & Components. Exhaust ... Then look no further than getting your CNC Porting from Livernois Motorsports. We use our specially designed and …A demonstration of the 5-Axis CNC Head Porting operation at HAMMER PERFORMANCE. This video shows our 5-Axis CNC machine porting an 883 head. The consistency ...Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve their air flow. Cylinder heads, as manufactured, are usually suboptimal for racing applications due to being designed for maximum durability.Ports can be modified for maximum power, minimum fuel consumption, or a … Description. This program works on the following head cWe have a few options you can purchase sucAuto Machine Specialties proudly introduces its c
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Brodix BR7 273 Heads $ 3,500.00 - $ 4,350.00 Select options; LS3 CNC Cylinder Head Porting Service $ 900.00 - $ 1,608.00 Select options; LSA CNC Cylinder Head Porting Service $ 900.00 - $ 1,608.00 Select optionsWe offer several. different versions of the complete "Pro-Port" cylinder head family which includes the 24. degree Victor BBC, the 15 & 18 degree SBC wedge heads, the raised runner 23 degree SBC. LS series Chevrolet, the Big Victor spread port BBC, the SB2.2 & ROX, SBF Victor wedge, Ford FE and the Pontiac. All of our port designs, CNC programs ...MHS 4.6L / 5.4L 4V Stage 2 CNC Porting Package - This is for 03/04 Cobra / Mach 1 Heads only. For GT500 Heads, please see our GT500 specific packages. We do NOT port "B" Heads or 99/01 Cobra Heads. Short and Sweet Description: This Package includes our Stage 2 CNC Porting Program with Hand Blended Bowls to Seats, Bronze …315+ CFM / CNC Round Port Edel Heads (Set/2) Customer supplied Edelbrock heads sent to us for porting services Disassembly of complete heads extra charge Valve job required on ported heads (contact. Welcome Guest My Account Order Status Wishlist (866)762-7527. Products.LSA CNC Cylinder Head Porting Service $ 900.00 – $ 1,608.00 Select options; 275 11 Degree LS3 Heads $ 2,680.00 Add to cart; Brodix LS7 285 $ 3,500.00 – $ 3,740.00 Select options; 706/ 862 CNC Cylinder Head Porting Service $ 1,098.99 Add to cartEM109H 248" x 24" x 36". 5 Axis. EM69HP High Power CNC Porting Universal Machining Center. Seat & Guide. SG9MTS High Volume (Manualmatic) SG90MTS SG90MTS. SG10XY Automatic Valve Guide-to-Guide.Port Expert. Mastercam Port Expert facilitates toolpath generation for CNC cylinder head porting. It is a fast and easy-to-use software for creating multiaxis toolpaths within cylinder head ports, complex tubes, or deep pockets. This software creates accurate, efficient porting motion on surface patches or solid body data.Exh. 117. 170. 210. 228. 245. 252. Our fully CNC'd 6.4, Hellcat, or Demon heads give you a stock size 2.140 intake/1.650 exhaust with an intake flow of 400cfm and an exhaust flow of 252cfm.West Coast Cylinder Heads. 16126 Cantlay St. Van Nuys, CA 91406. (818) 705-5454. www.proheads.com. GM LT, LS7, LS3, LS9 and LSA CNC ported heads. We expanded our line of upgraded CNC ported GM castings. Check out the specs on our data page. We can rework your heads or provide new cores depending on your needs.PRC CNC Porting Service - Cathedral Port Heads (Customer Supplied Castings) - PRR-199-CathedralPorting The price listed is for you sending your cathedral port cylinder heads (4.8/5.3, LS1, LS6, LS2, LQ4/9) to us for porting. Our stage 1 porting service will include the re-use of the stock vales. Stage 2.5 will include aftermarket 2.02/1.57 ...cylinder head porting is the key to producing power. high velocity high CFM cylinder head CNC porting for Harley Davidson motorcycles. We start by reviewing the desired power output of the motorcycle, then we compute the required CFM the cylinder head must flow. once we understand the CFM the cylinBecause we think that CNC Porting is the best and the same for every port, but that's how we can be sure, and the tests and research that we do prove it. The CNC is also repurged and polishing the machined cover to its ports. The CFM measurements of the final cover are then taken. From the results before and after, a report is prepared by ...In fact, the high cost of CNC head porting has severely limited its migration from the relatively high-volume hot rod automotive universe to the aviation world. To date Ly-Cons CNC head porting is a general aviation exclusive. Besides the cash investment, there is the additional time it takes a shop such as Ly-Con to develop the programming …PN: TEA-SBC220-CUSTOM 1962-1986 SBC Total Engine Airflow's latest 23 degree offering for the small block racer looking to use a bolt on head. Uses standard rockers no offsets needed. Great airflow using 2.055″ and 1.600″ Ferrea valves. Combustion chamber sizes available from 67cc-61cc. Assembled for your choice of .700″ mechanical roller cams or.630″ lift solid […]Clean heads CNC Porting, intake, exhaust and combustion chamber Valve Job New Valve Guides Porting program and valve job is designed for 2.000 intake valve and 1.570 exhaust valve size **Cylinder head assembly available, please call for pricing. Intake Flow .100 - 73 cfm / CNC Ported 65 cfm ...The latest chunk of aluminum from Edelbrock has been dubbed E-CNC and it replaces the RPM XT cylinder head. One quick look at the specs shows the E-CNC (rectangular port, PN 79559) has a left head ...In this video, I'm showing you the CNC Service Only Coyote 5.0 ported heads from Livernois Motorsports. I show the cost breakdown, how to ship the heads, wh...2004-06 Subaru STI EJ25, B25 Casting, Single AVCS. Perfect for 400+ whp Builds! After 25+ years of Hand Porting Heads we are now Digitizing our Head Designs and CNC Porting them in-house in our Rottler P69AHD 5 axis cnc head porting machine. Port sizes can be sized to match your HP levels. Precision CNC Porting Customer Supplied EJ25 …08-20 Hayabusa. CNC Ported Stock Valve Head. $1400. CNC Ported w/Stainless Steel Exhaust Valves. $1700. CNC Ported w/1mm Oversized Stainless Steel Intake Valves. $1700. CNC Ported Grudge Head w/1mm Oversized Stainless Steel Intake and Exhaust Valves. $2400.Summary. Base: $1,649.99 Configured: $1,649.99. Quantity: Buy in monthly payments with Affirm on orders over $50. Learn more. TSP Stage 1 N/A LS3 225/236, .629/.615, 114 LSA Camshaft (25-TSP225236-114) Re-use Customer Supplied Intake Valves. Re-use Customer Supplied Exhaust Valves.Lingenfelter CNC ported LS9 cylinder heads are complete new GM cast aluminum cylinder heads that are sold individually with light-weight titanium intake valves and hollow stem sodium filled exhaust valves designed to be durable even under extreme high temperature conditions seen with supercharged or turbocharged applications. These heads can be used for LS2, LS3 or LS9 based applications.Expedited Core Exchange - We will ship you a set of CNC ported heads fresh out of the machine and set up to your cam specs once the order is placed. Once your usable cores have made their way to us, LME will refund the cost of the cores. Current GM LT1 Cylinder Head core value is $1,350.00. **No matter what method you choose, once order is ...Lingenfelter offers a CNC ported version of the LT1 L86 aluminum cylinder head used on 2014-2015 production 6.2L Chevrolet C7 Corvettes 2014-2015 L86 6.2 L based GM trucks. LT1 L86 cylinder heads are precision CNC machined on our in house 5 axis CNC machine to ensure that tight tolerances are maintained. The Lingenfelter CNC porting procedure is a computer controlled machining operation that ...“CNC porting a head takes a job that may have taken weeks to do by hand in some cases, and turns it into just a few hours. Another huge advantage is it will also remove any flaws that the casting …CNC Head Porting. The traditional method of modifying cylinder heads by hand fettling was superseded some years ago with the advent of CNC (Computer Numerically Controlled) machinery and CAD-CAM (Computer Aided Design - Computer Aided Manufacture) techniques. However, this has been the preserve of the better funded professional engine ...OptiTorque10777 (Custom Age )24-Valve Cummins Head Stud Kit 900HP Plus. This Power Driven Diesel CNC Ported Street Series Cylinder Head is an upgraded cylinder head for your 2003-2007 Dodge Ram 5.9L Cummins and 2007.5-2018 Dodge Ram 6.7L Cummins. The 6.7L Cummins Cylinder Head was designed to supersede the 5.9L Cylinder Head.4P Pro H22 CNC Head. $1,350.00. Shipping calculated at checkout. Quantity. Add to Cart. Share. The CNC Ported Pro H22 cylinder head is perfect for your street/race all motor car or your high power turbo car. If you are building a large displacement maximum effort all motor drag race car, you should consider the Outlaw 370 H22 Head. The world's ...CNC Heads – Gas Flowed Cylinder Head Specialists. CNCHeads0. porting cylinder heads by hand is pretty much divining.
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Top Interesting "CNC Porting" Facts. CNC porting involves more than just loading a bare head into a CNC machine and pushing the magical GO button: "Each port design really starts out as a hand ported design," explains Bowen. "Things such as CFM, port volume and combustion chamber profile are just a few sources for data that are collected and analyzed during this process to ensure the ...Pro-Port CNC, Altona Meadows, Victoria. 2,341 likes · 149 talking about this · 15 were here. Pro-Port CNC has moved to Melbourne and now run by James Melmoth who has been porting heads and building...Honda TRX450 CNC Cylinder Head Porting. Alternative Views: Our Price: $335.00. Availability:: Usually Ships in 1 to 2 Weeks Product Code:TR-CNC-PORT. Add Valve Job: No Valve Job - Porting Only Yes, Add A Valve Job [Add $160.00] Head Disassembly: Have DASA Racing Disassemble & Reassemble Your Cylinder Head & Shim Camshaft [Add $100.00] Have DASA ...Our services include CAD Design, 5-axis CNC porting, engine building and dyno testing. Take a look at our photo gallery of our range of CNC ported 4 cylinder heads, CNC ported 6 cylinder heads, CNC ported inlet manifolds and CNC CAD images. Our video section contains several videos of our 5-axis CNC porting machine in action.Cylinder heads are cleaned and disassembled. Cylinder heads are hardness checked. Cylinder heads are pressure checked to 60 psi. Complete simultaneous 5 axis CNC porting of all ports and bowls guarantees repeatability port to port every time. Hand grinding this type of cylinder head and expecting repeatable results is an exercise in futility.Fits. The price listed is for you sending your cathedral port cylinder heads (4.8/5.3, LS1, LS6, LS2, LQ4/9) to us for porting. Our stage 1 porting service will include the re-use of the stock vales. Stage 2.5 will include aftermarket 2.02/1.57 stainless steel valves. We also offer valve spring upgrades. PRC CNC Porting/Machining Service Includes:CNC Ported Heads - Chambers and Ports. Intake and Exhaust Ports: Precision CNC Porting in our Rottler 5 axis CNC Porting Machine: Service Includes: Precision CNC Porting Customer Supplied Cylinder Head. Applications include: * This service does NOT include Head Casting, Disassembly or Assembly, Precision Multi-Angle Valve Job, or Resurfacing ...This head will offer 150CFM and fantanstic velocity. In the 98 kit, with tq in the 108+ range. We do things a bit different as out heads are cut on a 6 axis CNC machine. This offers repeatablity, and offers the best port design when it comes to dealing with core shift.PRC LS3, L92, & LSA CNC Cylinder Head Porting (Customer Supplied Castings) $ 899.99. PRC LS7 265cc 7.0L CNC Head Porting $ 1,081.99.The RMC V50HP takes CNC head porting to an new level of precision and efficiency. Its simultaneous 5-axis, PC-based CNC control easily handles precision head porting. RMC’s V50 CNC is a true simultaneous 5-axis, PC-based CNC controlled machining center equipped to handle precision head porting as well as other CNC …Check out our CNC porting services and cylinder heads to give your late model build to maximize your airflow and put you on the cutting edge of performance! 832-619-1622; 7413 Wright Rd. Houston, TX 77041; [email protected]; ... CNC Porting. Service Prices. Cart. Checkout. Tech. Contact.Description. • Replacement cylinder heads for Air/Oil-Cooled '17-later Milwaukee-Eight models equipped with 128 or 131CI Stage IV kits. • When combined with a larger bore throttle body, these CNC Cylinder Heads provide significantly improved efficiency of cylinder filling, leading to more explosive power and increased rear-wheel torque when ...Flowing up to 53 CFM more than the stock GM LS7 head, the all-new PRC cylinder heads offer both unmatched power and airflow! The 285cc runner is recommended for higher HP applications with a minimum bore size of 4.125". Cylinder Head Specs: Valve Angle: 12 Degree. Intake CC: 285cc.At Direct Motion, we use our own machine tool control technology in house for 5 Axis Head Porting & Digitizing. We are the largest, most effecient, and accurate CNC head porting operation in the world. We have 23 years of experience in CNC porting and port 100s of heads weekly.CNC Ported head for your Kawasaki Ninja 400cc,with this head porting and race valve job.This will allow your power to increase 3% to 5% to your mid-range/to...We have a few options you can purchase such as a pair of Stage 1, Stage 2, Stage 3, or Stage 4 LS 243/799 Cathedral casting 5 axis CNC Porting with stainless valves and WP .660 dual race springs with WP titanium retainers. These heads have been disassembled, inspected, cleaned, 5 angle valve job, and milled slightly to clean up the heads.Our Stage 2 CNC Ported Cylinder Heads are the best deal for 80% of applications. You get our Stage 2 CNC Porting Program w/ Hand Blended Bowls to Valve Seats, Our Stage 2 PAC Valve Springs, 4130 Chrome Moly Retainers, MHS Stainless Steel Valves, Tapered Nose Bronze Valve Guides, Trick Valve Job (4 Angle Intake, 3 Angle / Radius Exhaust), Viton Valve Stem Seals, Surfaced and Assembled.M8 ST 3- This is a fully developed CNC ported head with excellent flow that makes huge improvements to the inherently weak exhaust flow of the stock heads. Improved velocity to make excellent torque early. For use on big bore M8 engines. O.S. Valves are 41/33 mm. This head will make 140-155 HP in a variety of displacements with pump gas ...These Cylinder Heads can be purchased outright, or you can send in your own cores. Our Stage 3 CNC Porting Package for the Ford GT / GT500 Cylinder Heads is a great choice for moderate to high HP street car applications where additional cylinder head flow is wanted. While the GT500 Heads flow very well from the factory, there is a ton of room ...Posted by u/mingilator - 455 votes and 113 commentsAfter cleaning, CNC porting and guide replacement, SportMax heads are fitted with high quality 7mm stainless steel 1.900" intake / 1.610" exhaust valves and beehive springs with chrome-moly steel retainers. Special valve seat machining and blending for a smooth transition to the ports is performed by our highly skilled specialists.Performance CNC Racing Technology - 5-Axis CNC Porting, Custom Machining And Cylinder Head Porting Service. Performance CNC specializes in Precise Reverse Engineering of Racing Cylinder Head Ports and Chambers and the precise machining of Master Model Details using 5-Axis CNC Equipment.Developed over 20 years of racing experience and professional race team partnerships, M-Spec is the world's largest offering of Big-Bore Kits, CNC 4-Stroke Cylinder Head Ports, and 2-Stroke Performance services. Some popular M-Spec products include M-Spec bolt-on billet and bolt-on cast big bore kits for ATV and UTV application like the 625cc ...PRTIF: Get the latest PORT stock price and detailed information including PRTIF news, historical charts and realtime prices. Indices Commodities Currencies Stocks In 1997 Mike purchased a 5 axis CNC mach