Cat question

Reply Subscribe

Thread Tools

Search this Thread

Sep 3, 2009 | 03:29 PM

ramair21

Thread Starter

12 Second Club

iTrader: (2)

Joined: Dec 2005

Posts: 339

Likes: 0

From: Cali

Cat question

Im about to do a header swap pretty soon. Just wondering if there is a good enough cat to replace the factory cat. I heard OB2 cats would work fine, just wanted to know if anyone has replaced theres with an aftermarket legal cat. that still passes smog.

Joey J.

Sep 3, 2009 | 03:36 PM

hitmanws6

TECH Veteran

iTrader: (20)

Joined: Dec 2008

Posts: 4,041

Likes: 5

From: Orange, CA

if you are doing LTs there are a few issues. first off, its extremely hard to pass with LTs and a catted y, especially if you delete the emissions equipment. second, if you do get it tuned to pass, you will fail visual. so i would just do the LTs, get some bullet cats to quiet the exhaust down, and buy a smog. just my .02

Sep 3, 2009 | 03:44 PM

ramair21

Thread Starter

12 Second Club

iTrader: (2)

Joined: Dec 2005

Posts: 339

Likes: 0

From: Cali

im not worried about the visual check, thats the least of my worries. Its the sniffer that im more worried about. I want to use my factory cats but not sure if they will fit under my car after i install the L/T so i wanted something to replace them but that works just as good. Would the bullets work good??

Sep 3, 2009 | 03:48 PM

hitmanws6

TECH Veteran

iTrader: (20)

Joined: Dec 2008

Posts: 4,041

Likes: 5

From: Orange, CA

the bullets are designed to reduce exhaust noise without giving up power so im not sure they will work that well

Sep 3, 2009 | 03:53 PM

ramair21

Thread Starter

12 Second Club

iTrader: (2)

Joined: Dec 2005

Posts: 339

Likes: 0

From: Cali

Hey HITMAN!! thanks for helping out dude! I dont mind exhaust noise, i just need a cat that will clean up the emissions thats all. Just pass smog and take out and wait 2 more years. Anyone else have experience with an aftermarket legal cat that still works as good as the factory cat??

Sep 3, 2009 | 04:11 PM

hitmanws6

TECH Veteran

iTrader: (20)

Joined: Dec 2008

Posts: 4,041

Likes: 5

From: Orange, CA

if you can get your hands on some carsound cats id say they will do the best job. a bit pricey though

Sep 3, 2009 | 08:24 PM

Da Swami

TECH Apprentice

iTrader: (6)

Joined: Sep 2006

Posts: 330

Likes: 0

From: UCLA

I have the mods in my sig with removable Magnaflow cats for the duals and I pass (read: legitimately) smog every time; generally with better results than my family's other cars.

Un-tuned.