I have the full shebang. I really don't think that you will get the response that you want until you get into some major engine changes (cams, turbo, porting ect...) and a higher stall torque converter.

that being said, I have the pacesetter header and I feel that it WAS worth the $$, but only because of the smoothness of the exhaust and the bragging rights. it did not help my times one bit.

BTW. I run a 17.7 @ 77 mph consistantly.