headers or cats
This is a discussion on headers or cats within the External Engine forums, part of the LSx Technical Help Section category; my o1 z-car doesnt seem to run right and a code of O2 sensor on bank 1 is bad its ...
06-21-2008, 06:59 PM #1
headers or cats
my o1 z-car doesnt seem to run right and a code of O2 sensor on bank 1 is bad its 70 bucks for a new one but was lookin at adding headers and true dual exhaust...anyone think this will work.... also what is the best exhaust for this car single in dual out or true duals...has flowmaster on it now but dont sound right.... lookin at borla thanks for any info
06-21-2008, 09:36 PM #2
- Join Date
- Feb 2007
- San Diego, CA
2002 Z28 A4 NBM
- Sadly now demodded :(
FYI: All this is done to the 2002. The 1998 is bone stock.
I run QTP stainless steel long tubes with only the front O2 sensors. I have no cats, no AIR and I programmed out the rear O2 sensors. The headers run into a 2-1/2" true dual setup with an X-pipe and a pair of Magnaflow mufflers dumped at the axle. I also have a Volant CAI. All this netted me 343rwhp/357rwt after a dyno tune. I also put 3.73 gears in it. Next up is a 3400 stall that I've purchased but haven't installed.
BTW: I can do this as there is no visual or tail pipe inspection where I'm at. They plug in and if the comp passes (no codes) and the gas cap holds vacuum you're good to go.
06-21-2008, 11:36 PM #3
I personally have heard single exhaust LS1's sound good and I have heard true duals sounds good. its all in what combination u run. go listen to some sound clips of exhaust and u will find what u want. I like borla stingers myself.
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