I have the C3 pulley, NW single intake, InMotion custom tune, and resonator/rear cat delete but I can't 12 flat How did you modify the cooling system and do you think that helps with heat soak?? I want to hit 11's but I thought I needed the manifolds. I guess the drag radials are mostly to blame but I don't want to go that route since there aren't alot of tracks around here. Can I hit 11's without slicks?? I have hit 7.95 @ 90 once when I didn't spin at all but I took off from idle. Does anyone know if the $1400 mani's are worth it? or is there a cheaper way??!!??