| the reason I told you to get cams and springs is one so your torque curve does not drop as fast and two you can rev higher. The manifolds will help with power all around and a little on the curve falling due to less restriction but not as much as cams will. Stock Z cams are so small. If you can open up the restrictions in the motor being manifolds, cams, exhaust, extra then the only thing really slowing you down is the small turbine on the turbo's then your going to have some great power. Go with the Tomei 264 cams with 9-9.5 lift, that way not to much overlap and great flow. later, Danny
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