1/4 mile time
u dont think 300HP is enough??? i had a FM on my LT1 z28 and changed to a diff chambered muffler and i felt the difference which shown at the track as well. i bet there was a 20HP change. 80 series suck. not made for a high revving engine like the LS1. they are made for an engine that isnt goin to see high rpm HP but more low end torque.
The Best V8 Stories One Small Block at Time



