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Originally Posted by carmadbaker
Of course an uprated head gasket and head stud kit would be of great use!
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thats in the 230bhp section. there is no uprated gasket and head studs are generally needed for over 18psi as it lifts the head. id put that in the 300+bracket.
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Originally Posted by carmadbaker
gas flowing and porting carries its advantages although perhaps not adding BHP by itself
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porting adds power all over the rev range, its not as good on a turbo as a nasp as the air is forced in but its said to be 15% gain on a nasp and 5% gain on a turbo.
ive not seen anyone with an aftermarket inlet manifold (except myself
). most use an M series inlet with the throttle body re-positioned to open the restrictive part of the manifold.
Drew