help on a performance mod

jeremyc · 6-12-03, 0:26

Ok, I drive a 96 LS with an ATX. I am looking to get a new converter for my car. I was thinking test pipe. But i have been told that there are O2 sensors for the Cat. Is this going to be a problem? I did a search on this but never really found too much that would help me. Also, what are the measurements for the High flo cat or a test pipe. What is the diameter of the stock exhaust? how long is the Cat? Any and all help will be greatly appreciated. Thanks all.
Jeremy

**SilverLS** · 6-12-03, 2:57

The stock Cat is 17 inches i think.. could be 18.. i think u do have an O2 sensor after the cat.. get a highflow from www.testpipe.com its like $60 for a 2.5" diameter one...

**SlickSix311** · 6-12-03, 13:52

if you don't want a CEL and bad gas mileage you're going to need an O2 simulator. search for it, i forget where u can get them.

**SilverLS** · 6-13-03, 2:45

so this thing will make ur gas mileage stay good?? i cant find anywhere that makes them for imports.. all i see is american cars..

**Stage36** · 6-14-03, 20:40

youll throw a catalyst efficiency code... p0420 IIRC...

whats wrong with your current cat?

jeremyc · 7-20-03, 3:19

The current cat is too restrictive. I want something a little more free flowing.

**Stage36** · 7-20-03, 14:49

Quote:

Originally posted by jeremyc
The current cat is too restrictive. I want something a little more free flowing.

what makes you think its too restrictive?

**skater0422** · 7-21-03, 1:14

I would do a High Flow Cat way before I ever did a test pipe.

**SilverLS** · 7-21-03, 6:13

if you dont have OBD II then there is no point in wasting money on a high flow cat..

**Stage36** · 7-21-03, 22:13

high flow cat has about the same backpressure characteristics of a stock cat. go to a muffler shop and buy a universal one with a larger diameter... thats really all a high flow cat has over the stock cat.

Quote:

if you dont have OBD II then there is no point in wasting money on a high flow cat..

Emissions... state inspection... the fact that he has OBDII...

P0420!!! P0420!!!