Originally Posted by ray pampena
I'm not maxed out. For the test I did 2 runs back to back. 23psi.
Stillen downpipe no cats.
Full exhaust 595
Open downpipe meaning no catback 611
I'm winter e85 so I didn't bother cranking it up
So in both setups, you had no cats? Or just the open downpipe?
If so that is a pretty significant power drop by having stock exhaust.