Precats

Reply Subscribe

Thread Tools

Search this Thread

04-16-2003, 01:32 AM

Matzima 151

Newbie - Just Registered

Thread Starter

Join Date: Apr 2003

Posts: 1

Precats

Anyone bypass their precats by either an aftermarket y-pipe by modifying the stock y-pipe? If so, any problems like the check "engine light going on"? I want to go for it but all I hear from people is that the "check engine light" is going to go on. Is the power gain nocticable?

04-16-2003, 05:34 AM

Midknight MAXX

Donating Maxima.org Member

iTrader: (1)

Join Date: Nov 2002

Posts: 628

Re: Precats

Quote:

Originally posted by Matzima 151
Anyone bypass their precats by either an aftermarket y-pipe by modifying the stock y-pipe? If so, any problems like the check "engine light going on"? I want to go for it but all I hear from people is that the "check engine light" is going to go on. Is the power gain nocticable?

Tons of people have y-pipes. CEL is not an issue. Do yourself a favor and read threw the FAQ thread at the top of the posts. It helps with ?s like this.

04-16-2003, 07:46 AM

StygianMax

Senior Member

iTrader: (8)

Join Date: Dec 2001

Posts: 3,059

Re: Precats

Quote:

Originally posted by Matzima 151
Anyone bypass their precats by either an aftermarket y-pipe by modifying the stock y-pipe?

There's no point trying to find gains by trying to modify the oem y-pipe. You'll understand why by looking at motorvate.ca y-pipe analysis. Two problems you won't be able to deal with with your "pre-cat bypass" approach are:
* oem's T-collector
* squished cross-section in oem y-pipe where O2 sensor is.