MACE Aluminium heads to suit L67 Supercharged 3.8L V6 VS VT VX VY

***NO LONGER AVAILABLE****

Only do these new heads address every shortcoming of the factory iron heads, they are one of the single largest mods you can do to improve the performance of your vehicle.

Benefits include:

16 pounds of weight savings, improving vehicle weight balance, launching, handling, fuel economy and braking

Increase flow provides large HP gains in every application and better engine efficiency for improved economy

Aluminium allows higher boost and/or more compression with the same octane fuel

56cc chambers increase compression

148cc intake runners, 58cc exhaust

Reinforcements to prevent flexing under high boost applications

Extra material for custom port work

Sturdy rocker stands which remove potential rocker arm movement under high loads

Custom designed to allow the addition of extra head bolts on top and below cylinders

1.96 intake 1.57 exhaust valves

Surface finish of 40 ra ensures perfect sealing with any head gaskets

Complete heads - Assembled and ready to bolt on. (Complete with 130# springs, REV valves, hardened seats, guides,

valve seals, retainers, keepers. Setup for up to .600 lift)