MTI Hand Ported Cylinder Heads MTI has spent hundreds of research and development hours in GM Gen-III and Gen-IV cylinder head port design. This allows us to bring to you the finest, highest flowing cylinder heads available. Using our Superflow SF-600 flowbench with Flowcom, and data analysis software, we are able to give you proven results on paper for your individual cylinder heads. This guarantees that your cylinder heads flow exactly what we promised, and will reflect that on the dyno, the street, and at the track. MTI has engineered, designed and produced exclusive custom titanium retainers, and spring cups that work with our dual valve springs. This lightweight combination offers you the best high RPM valvetrain stability, and the highest reliability against any type of spring failure. No time or expense is spared in our cylinder heads, as it takes a minimum of one full week for one of our cylinder head techs to produce one complete set. MTI maintains the highest standards, and only the best parts are used in our completed heads. This assures us that our finished product cannot be outperformed in any area. While other cylinder head porting companies may be new to the scene, you can count on years of MTI's experience to bring you the best, most reliable performance cylinder heads possible. Click HERE for an in-depth description. Stage 2E Cylinder Heads Complete hand porting of intake, and exhaust runners for excellent flow volume & air speed with major bowl work performed. Ferrea 2.02" stainless one piece intake valves, and 1.56" exhaust valves are used in the factory valve seats. High performance dual valve springs coupled with our custom lightweight titanium retainers and specially machined spring cups offer the most stable, and reliable valvetrain. These heads can be milled .030" to increase the compression ratio by 1/2 of a point. This is an excellent street cylinder head with flow numbers approaching 300 CFM on the intake runner and 210+ on the exhaust side. Each set of cylinder heads will come with their own individual flow sheet. If you're looking for a great cylinder head at a great price, look no further. Available for LS2, LS1, LS6, LQ9 and all 5.3L truck castings. See the flow sheet attached to this page for flow data. Stage 2R Cylinder Heads Intake and exhaust ports are fully maximized for flow volume, and port velocity. New hardened intake and exhaust seats are installed along with bronze valve guides, and custom 8mm one piece stainless steel Ferrea valves measuring 2.055" on the intake, and 1.60" on the exhaust. High performance dual valve springs coupled with our custom lightweight titanium retainers and specially machined spring cups offer the most stable, and reliable valvetrain. These heads can be milled .030" to increase the compression ratio by 1/2 of a point. These cylinder heads power some of the quickest and fastest LS1s, LS2s & LS6s in the country. This is an excellent cylinder head choice for those considering a larger displacement engine in the near future. Please call MTI to confirm current.production scheduling lead time at (281)870-8787. Stage 3 Cylinder Head Upgrades The Stage 3 is an upgrade based on the Stage 2R heads. Stage 3 heads are intended for larger displacement engines with non-factory cylinder bore diameters (over-bored or re-sleeved LS2s including the C5R block). The Stage 3 upgrade involves enlarging and polishing the combustion chambers to match the required bore diameter, as well as having the option to replace the 2.055" intake valves with larger 2.080" custom valves. This Stage 3 upgrade is only available at this price upon original order placement of MTI Stage 2R cylinder heads. Flow bench Numbers Note: Results may vary. Click any graph for a better look. CNC PORTING CANNOT MATCH THE PERFORMANCE OF OUR HAND PORTED CYLINDER HEADS.   Stock Cylinder Head   MTI Hand Ported Cylinder Head Description Price MTI Stage 2E Ported Cylinder Heads $1,750 +exchange MTI Stage 2R Ported Cylinder Heads $2,850 +exchange MTI Stage 3 Head Porting Upgrades (for larger sized engines only, must place order for Stage 2 heads at same time) $595 a pair MTI Custom Grind Camshafts MTI LS1/LS6 camshafts are developed at MTI and ground to our exact specification. They are designed for maximum power output and best drivability. Our billet steel cams incorporate our fast ramp design and are generally worth 30-40 HP in most applications. The famous C2, G1, & X1 cams can be successfully used with stock cylinder heads when accompanied with our valve train upgrade package. Vehicles equipped with automatic transmission will require a higher idle speed through custom PCM programming (see Computer section). MTI can also have any cam specs custom ordered at no additional charge. Contact us at (281) 870-8787 with your own custom specs. MTI's new Stealth series cam is designed to have minimal lope at idle without sacrificing performance. It is on a wide lobe separation and has no advance built into it which allows it to produce good low end power with an abundance of top end power rivaling much larger spec camshafts. Click HERE for a video clip of it at idle.   MTI Signature Series Cam Duration Lift Lobe Separation Intake Exhaust Intake Exhaust C2 224 224 .581 .581 112 G1 228 232 .588 .575 113 X1 230 227 .591 .571 112 R1 232 236 .575 .578 114 Z1 236 236 .585 .585 112 S1 244 244 .612 .612 112   MTI Stealth Series Cam Duration Lift Lobe Separation Intake Exhaust Intake Exhaust Stealth I 220 220 .581 .581 115 Stealth II 224 220 .581 .581 116 Description Price C2 Custom Camshaft $399.00 G1 Custom Camshaft $399.00 X1 Custom Camshaft $399.00 R1 Custom Camshaft $399.00 Z1 Custom Camshaft - recommended for 383 cubic inch or larger engines $399.00 S1 Custom Camshaft - recommended for 427 cubic inch or larger engines $399.00 Stealth I Custom Camshaft $399.00 Stealth II Custom Camshaft $399.00 MTI 475 HP Heads and Cam Package MTI's 475 horsepower engine package provides a substantial increase in horsepower and torque over the base engines power level. The CTS-V engine is identical to the LS6 Corvette engine. With the MTI power package, drivability, reliability and fuel mileage are unchanged from stock creating no sacrifices for the additional 70+ horsepower. This package is designed to run on premium fuel (91+ octane) and requires no special maintenance procedures. MTI's 475 horsepower CTS-V heads and cam package includes: Click HERE for a closer look at the dyno sheet. Note: This is a before and after comparison. Results may vary. MTI Stage II LS6 Performance Aluminum Cylinder Heads MTI's fully prepped Stage II LS6 cylinder heads come outfitted with custom built 8mm severe duty stainless 2.020" intake valves and 1.560" exhaust valves, performance dual valve springs, and our unique design lightweight titanium retainers. The intake and exhaust ports are thoroughly ported and polished for maximum air velocity and volume. Just like our engine blocks, every cylinder head is completely machined and assembled in house. Every set of MTI cylinder heads is flowed on our own SuperFlow SF600 flow bench to ensure they are up to our strict air flow requirements. MTI Stage II cylinder heads are sold on an exchange basis. MTI Custom LS6 Performance Camshaft Profile MTI's custom grind LS6 billet steel camshaft profile is designed for increased performance throughout the entire RPM range. This profile has substantially higher valve lift and duration over the factory cam without a choppy idle associated with some aftermarket cams. MTI has engineered these new "Stealth" camshafts to produce maximum power with the best drivability. MTI Custom Exhaust X-Pipe Kit Using Nascar technology, MTI has engineered an exhaust "X" crossover that replaces the very restrictive resonator that comes equipped on the V cars. The new X pipe dramatically increases exhaust flow freeing up substantial horsepower yet still keeping the car very quiet inside the cabin. - comparison picture | installed picture #1 | installed picture #2 Modified Air Intake System MTI has spent hours on the Dynamometer extracting the maximum horsepower by eliminating all restrictions in the air intake path. A free flowing air intake system is required for maximum gains from ported cylinder heads and larger camshafts. Complete Gasket, Bolt and Accessory Kit MTI uses genuine GM head gaskets and factory engine bolts on re-assembly. This kit also includes high tech hardened chromoly one piece push rods built to our specs, NGK V-Power spark plugs, silicone spark plug wires and all necessary fluids. LS6 Custom Computer Programming The factory computer requires reprogramming with this package to allow for a higher engine RPM operating range, cooler engine temperatures, retuned spark timing and air/fuel ratio changes and necessary idle speed adjustments. Eliminated is that annoying one-to-four skip shift that forces you to shift from 1st gear to 4th gear at lower speeds. Description Price MTI 475 HP CTS-V Heads & Cam Package - Installed and Dyno Tested $6,495 +exchange MTI Valvetrain Components MTI stocks several valvetrain components in order to upgrade and provide more reliability for the weak factory valvetrain. Our heavy duty spring and retainer parts give your engine the necessary spring pressures required for any of our camshaft selections. Call us if you need assistance in making the proper selections. Description Price MTI Valvetrain Package (For use with performance camshafts on stock cylinder heads. Includes Manley springs, titanium retainers & MTI hardened push rods.) $399.00 Manley 221423-16 valve springs for stock head applications (set of 16) $149.00 Manley 23632-16 titanium valve spring retainers for Manley 221423-16 springs (set of 16) $149.00 MTI 7.4" custom chromoly pushrods only (set of 16) $119.00 CompCams #26918 LS1 valve springs for stock head applications (Uses factory valve spring retainers) (set of 16) $189.00 MTI HD Dual Valve Spring Package (Includes dual springs, custom titanium retainers & custom spring cup locators. Requires machining of cylinder heads.) $349.00 Jesel Roller Rockers Jesel's 1.7 shaft mounted rocker arms are some of the best money can buy. Longer rocker arms provide higher rocker ratios, proper travel, arc geometry and enough rocker-to-valve spring clearance to run big race springs. CNC-machined aluminum rockers are extra rigid to insure true rocker ratio. Shaft mounting reduces reciprocating mass for high rpm use, easier access to valve springs, lash caps, retainers and locks, longer valve spring life and is a complete bolt-on assembly with rocker arms, shafts, stands and hardware. Note: Clearancing of the factory valve covers is required with the use of these rocker arms. Description Price Jesel SS Series Roller Rockers (non-adjustable) $895.00 Jesel Roller Rockers (adjustable) $1399.00 Comp Cams OEM Lifters MTI recommends a change to these heavy duty lifters for any modified or high output hydraulic valvetrain setup. Description Price Comp Cams OEM Lifters $209.00 Copyright © 2002-2006 Motorsport Technologies, Inc.  |  All Rights Reserved  |