Not to go off topic too much but a test pipe is out of the question for me. I was considering the high flow cat. from Perrin but will it pass NYS inspection?

 

When that time comes this will be my game plan!

 

It may not....it all depends. Some high flow cats flow too well, so they still throw a CEL.

I had a high flow cat on my VIII. It was a good one, and did not pass inspection. So I said f it, and just put on a test pipe. No reason to run a high flow cat if it's not going to pass anyway, right? Might as well just run a test pipe....

So really, you need to get a "bad" high flow cat to pass inspection. And at that point, why buy anything that doesn't flow well???

 

get the test pipe... it will make ur car sound better along with the great sound

 

Have you dyno'd with it and been able to narrow down gains gotten from it?
Any recommendations on where to get it for cheap?
Thanks in advance,
Luc

 

Thanks for the response Stein.

 

I recommend the HKS metal catalyst. No CEL and great power.

 

IMO, instead of worrying about emissions and passing smog checks, just get a regular test pipe. If you're concerned about sound, then get it resonated or w/a mini-muffler (Ultimate-Racing has those). Getting an HFC is a waste, it's not gonna pass smog, so might as well get something that allows u to go 100% of the way.

Just my personal opinion on things....

 

I have had my ams test pipe for three months now and still didn't put it on.I purchased it and right before I was going to put it on I started reading test pipes on the forums,found out about the flames issue and decided not to put it on.I think I'm gonna go wit a ur hfc.

 

bump.. anybody have data to show gains on just a testpipe alone? (tuned)

 

Here is just bolting on a test pipe (no tuning for the test pipe yet) into a stock exhaust system (replacing stock cat) on a tuned Evo 10 (tuned for stock cat):

 

im not a fan of getting flames out of my exhaust here in california haha, the laws here suck so bad. Even with a test pipe and silenced exhaust cops know if you are running a test pipe just from the smell. the gains arent that significant from what ive seen. hfc 7-9 hp, test pipe 10-15. so 5-6 more hp isnt worth getting a ticket over. my only exception of getting a testpipe is if im running over 375hp-400hp then the cat just gets way too restrictive. even though i have noticed better spool up time with a test pipe. If you dont have cop issues then i would go for a test pipe. just my opinion =]

 

Go with the cat. Especially if your car is WW. Test pipe = black rear bumper.