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Cylinder Heads & Valvetrain Components



Ferrea Valve Locks | 2008-2015 Mitsubishi Evo X 4B11T (K10091)

$88.48 $123.04
You Save 28% ($ 34.56)

Ferrea Complete Valve Lock Set | 2003-2006 Mitsubishi Evo 8/9 (K10035 SET)

$88.48 $123.04
You Save 28% ($ 34.56)

OEM Mitsubishi Valve Spring Retainer Lock | 2008-2015 Mitsubishi Lancer Evolution X (MN183955)

$1.90 $2.09
You Save 9% ($ 0.19)

Ferrea Valve Locks | Mitsubishi 4G63T (K10035)

$5.53 $7.69
You Save 28% ($ 2.16)

Ferrea Valve Locks | 2003-2005 Dodge Neon SRT-4 (K10079)

$5.53 $7.69
You Save 28% ($ 2.16)

Brian Crower Billet Keepers / Locks for 5.5mm Honda / Acura applications

$92.61 $100.12
You Save 8% ($ 7.51)


Brian Crower VALVE KEEPERS/LOCKS - 6 deg. / 6mm Stem Diameter (Nissan SR20DE/T)

$92.61 $100.12
You Save 8% ($ 7.51)

Ferrea Valve Locks (Subaru WRX EJ20 2002-2009) K10061

$88.48 $123.04
You Save 28% ($ 34.56)

Brian Crower Valve Keepers / Locks | Toyota 2JZ-G(T)E (BC2950)

$138.91 $150.17
You Save 7% ($ 11.26)




Brian Crower VALVE KEEPERS/LOCKS - 6 deg. / 6mm Stem Diameter (Toyota 3SGTE)

$92.61 $100.12
You Save 8% ($ 7.51)

Comp Cams Steel Valve Locks (LS1 / LS2 / LS6 engines)

$36.46 $40.51
You Save 10% ($ 4.05)

For everything else you can do to amp up your engine, it allow comes down to combustion – and in this sense, the cylinder block is the heart of the engine. A good cylinder head and valvetrain are essential for maximizing the effectiveness of the combustion chamber and pushing air, fuel and exhaust where they need to go. Our automotive cylinder heads and valvetrain components maximize flow for performance so incredible, this chamber of secrets will seem almost wizardly.

We offer auto cylinder heads and cylinder rebuilds that are precision-machined for maximum efficiency and usable power. Cosworth big valve cylinder heads and Tomei heads come complete with ported runners, performance valve jobs and upgraded camshafts. For Mitubishi Evo owners, MAP offers five stages of in-house cylinder head preparation, ranging from basic valve jobs and cleaning to aggressive porting and polishing for serious racers. We also offer a cylinder overbore option with multiple choices for valves, seals, guides and springs.

If you’re looking to do your own rebuild or maintenance, our valvetrain parts run the gamut for vehicles and engines of all kinds. MAP high performance valves use an undercut stem that reduces weight for improved air/fuel flow and RPM limits. Strong seals are vital for keeping fluids and gasses contained, and Cometic head gaskets use three layers of stainless steel for long lasting protection. In our inventory, you can find camshafts, aluminum valve covers, intake valve guides, beehive valve springs and anything else you can think of for overhauling your valvetrain. We even have sprocket tools and valve spring compressors to make your rebuild easier.

Whether you’re a professional racer or a track day enthusiast, you’ll love the power and reliability that beats in the heart of your engine when you’re done with us. From providing expert advice to testing your head rebuilds at our machine shop, we’ve been trusted to do great work at a great price for a decade and counting. Check out our selection today and feel the roar under your hood.


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