Quote Originally Posted by DirtyMechanic View Post
15 is way way to high for the spacers. you might see a 8whp peak but the power band wont drop like a sky slope after 5500rpm. i have before and after of my crawford plenum with out taking the car off the dyno. ill scan the dyno for you...
MREV is the spacer plus lower collector. the torque from this mod is actually noticeable in the butt dyno...