[Supermans]

Originally Posted by camaro1

true, but 400hp is at the engine,, the auto cars only dyno 315-320hp at the wheels(manual trans cars dyno 360-380),, look under your car, the auto's have 4 cat converters, and a huge 34" x 11" resonator and 2 mufflers, that along with the trans tune really kill the performance of the auto,, gm was really trying to get fuel mileage from the L99 and auto trans

you want your auto to beat manual trans cars you need to:

1. tune the trans and get a converter
2. get the exhaust to flow

and 3., remove AFM with the tune as well..