Questions about ZZP catless downpipe.
Questions about ZZP catless downpipe.
Catless is good if you want your car to both sound and smell like ****. You will NOT make more power over a high-flow setup. There are 700hp factory cars that have cats, your ******* Chevy Cobalt is not going to benefit from not having one. I've had so many different exhaust setups over the years that I'm not even going to bother arguing any further with you noobs.
HOWEVER, if you do insist on not listening and going Catless on an LSJ car, I HIGHLY RECOMMEND you use some sort of silencer in the exhaust to combat rasp.
HOWEVER, if you do insist on not listening and going Catless on an LSJ car, I HIGHLY RECOMMEND you use some sort of silencer in the exhaust to combat rasp.
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Questions about ZZP catless downpipe.
Catless is good if you want your car to both sound and smell like ****. You will NOT make more power over a high-flow setup. There are 700hp factory cars that have cats, your ******* Chevy Cobalt is not going to benefit from not having one. I've had so many different exhaust setups over the years that I'm not even going to bother arguing any further with you noobs.
HOWEVER, if you do insist on not listening and going Catless on an LSJ car, I HIGHLY RECOMMEND you use some sort of silencer in the exhaust to combat rasp.
HOWEVER, if you do insist on not listening and going Catless on an LSJ car, I HIGHLY RECOMMEND you use some sort of silencer in the exhaust to combat rasp.
Just for the sake of the argument, while I have no dyno sheets to prove anything... I noticed zero difference other than sound and smell when I switched from my ZZP catted to my ZZP catless. While I enjoy the sound it smells awful. Don't know if the ethanol is partly to blame but it's pretty bad
And to get back on topic, I haven't had to turn any codes off with the catless/angled bung. I had the angled bung on my ZZP catted and I would actually throw post cat lean codes (p2096) every so often.
And to get back on topic, I haven't had to turn any codes off with the catless/angled bung. I had the angled bung on my ZZP catted and I would actually throw post cat lean codes (p2096) every so often.
Senior Member
Joined: 06-03-07
Posts: 14,142
Likes: 71
From: NY
Just for the sake of the argument, while I have no dyno sheets to prove anything... I noticed zero difference other than sound and smell when I switched from my ZZP catted to my ZZP catless. While I enjoy the sound it smells awful. Don't know if the ethanol is partly to blame but it's pretty bad
And to get back on topic, I haven't had to turn any codes off with the catless/angled bung. I had the angled bung on my ZZP catted and I would actually throw post cat lean codes (p2096) every so often.
And to get back on topic, I haven't had to turn any codes off with the catless/angled bung. I had the angled bung on my ZZP catted and I would actually throw post cat lean codes (p2096) every so often.
Also LNFs don't sound like LSJs when you remove the cat
New Member
Joined: 09-26-09
Posts: 117
Likes: 0
From: rochester, NY
I have a Catless with the angled bung from zzp and throw a cat code now.. overall I'm very pleased, but if you're tuning then don't spend the extra mone. I tuned my 02 sensor out, so no more code. Wish I would've known before the extra 40 bucks or what not haha
idk why your throwing a code, ive been running catlees now for over 3 years and mines from turbo xs with an angled bung. you might have other issues there my dude
Member
Joined: 03-28-08
Posts: 201
Likes: 1
From: PA
The 2nd cat is restrictive, & should be 'cored', or replaced with a high-flow,high-volume cat.
The 1st cat is fine, & helps low-speed response, & doesn't hurt top-end power.
My last time at the track, I ran 12.3s all day, with a HHR SS automatic, at 1,200'.
I've tested many DP setups, at the track, & the stock DP, with a 'cored' 2nd cat, works best,
with a stock K04 turbo.
I'm also running the stock intercooler, & hot/cold pipes.
The 1st cat is fine, & helps low-speed response, & doesn't hurt top-end power.
My last time at the track, I ran 12.3s all day, with a HHR SS automatic, at 1,200'.
I've tested many DP setups, at the track, & the stock DP, with a 'cored' 2nd cat, works best,
with a stock K04 turbo.
I'm also running the stock intercooler, & hot/cold pipes.
Questions about ZZP catless downpipe.
Originally Posted by crispino
I have a Catless with the angled bung from zzp and throw a cat code now.. overall I'm very pleased, but if you're tuning then don't spend the extra mone. I tuned my 02 sensor out, so no more code. Wish I would've known before the extra 40 bucks or what not haha
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