I have a 99 GT 5 speed with PI heads. I currently ran a 13.6 at 100mph. I want to run a 12.5. Can you list what I need to do to my car to run this? Here is what I already have done to my car:
Cobra IRS from a 99 Cobra
4.10 Gears
Magnaflow Exhaust
H-pipe
Gutted cats
Underdrive Pullies
K&N induction kit
Sachs Clutch
Thanks, Tyler
Cobra IRS from a 99 Cobra
4.10 Gears
Magnaflow Exhaust
H-pipe
Gutted cats
Underdrive Pullies
K&N induction kit
Sachs Clutch
Thanks, Tyler