Going back to a stock exhaust is really depressing, so this will be my first mod on my new ISF.

I've been listening to all aftermarket exhausts and they all sound awesome. Something that intrigues me is the flow. As many of you know already, on my 08 ISF I removed the mufflers and second cats and the car sounded beautiful. To some people it was kind of loud, but to me loud is not bad so I was happy. What I've noticed is that my car revved quicker than ISFs with aftermarket exhausts, is that possible? To all people that have the OEM muffler/cat delete, am I right? Has someone in here measured the flow on these exhausts?

 

Did you had a shop cut off your stock cat and just install a straight pipe? I'm thinking of going that route. Any CEL? Thanks.

 

^^^ Yes, no CEL for almost 3 years.

 

I don't think it revs any quicker. Its probably the sound playing tricks. Makes you wanna jab the throttle quicker to hear that V8 growl