VandykeT/A

Set up is a sbe torquer 2 and prc 215 and ls6 intake. Right now the car has 1 3/4 headers and a 3" single dumped but before the tune I'm going to run it on out the back similar to a Mufflex. My question is how much am I giving up on a heads cam car staying with the single 3" vs a 4".

slow trap

iTrader: (22)

with a free flowing straight through type muffler i would say 10 or so. 15 or so with a chambered muffler. i lost around 20 rwhp with my 408 when i had the single 3" hooker. now have a 4" exhaust with a straight through muffler and it only loses less than 5 hp compared to open headers.