Right now im running the a stock y8 in my '89 SI and im in the need for a new cat. Im just wondering if going with a high flow cat will make any kind of difference at all, or should I just go ahead and get an OEM one.

TIA.

 

Anyone?

 

A high flow cat will definately flow more CFM than stock. One of those things that can't hurt. With a perf exhaust, they can change the exhaust sound somewhat. I like my carsound 2-1/4"
HTH
chris

 

cant go wrong

i got the catco hi flow cat

here
http://www.discountconverter.c...x.htm

part 6905

when i called them they said thats the perfect one for our cars.

 

Thanks guys. You guys have been a great help. Im gonna check out the catco one.

Ya, i've also got the 2 1/4" catback GReddy on it right now, so if it makes any kind of a difference at all its worth it. Well, I guess even if I dont notice a difference its still worth it since I need a new one anyways, haha.

 

noticed a diff when i put mine on...catco

 

I am running carsound. You can get the universal on ebay for 50 bucks. I actually called the place rather than order it through ebay.

I searched and it looked like carsound had more positive input than catco, but whatever works for you.

 

just installed a vibrant highflow .. i give it a thumbs up !! and it did make my exhaust sound deeper(thermal)

 

Hmm, how much was the Vibrant? I've heard a couple of positive things about it.