So I was happy with the sound of my Invidia exhaust until I added an Invidia test pipe. Without the stock Cat, the exhaust was too loud for me. I put in the silencers which helped a bit, but I was still getting a raspy rattle sound from around 2500-4000rpm. I recently added a Comptech header and now the exhaust sounds worse (i.e. louder). I've been looking at getting a new exhaust, but thought I might try a high flow Cat or resonated test pipe first. Any one have any experience with either. It's gotta be 2.5" to match the header.

Thanks,
Scott-

 

We have stock high flow cats

 

Really? What's the piping size on the stock cat? If that's the case, it doesnt' seem like there would be much of an advantage switching to a test pipe

 

Your already came,equipped with an high flow cat...

 

Other "high flow" cats are actually more restrictive than ours.

You'll find that Honda engineers didn't leave a whole lot on the table.

 

our cat is high flow

 

Get atest pipe.

 

I would say put back on the stock cat or leave the test pipe. There aren't that many choices. Just whatever sounds the best to you. You should be gaining a little power with the test pipe though.