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All You Need to Know About Downpipes

2.0L LNF Performance Tech 260hp and 260 lb-ft of torque Turbocharged tuner version.

All You Need to Know About Downpipes

Old 09-02-2011, 10:52 AM
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Originally Posted by Treadstone View Post
Thanks for the update on this thread, here is the link to our Downpipe....100% made in the USA!
08+ Cobalt SS 2.0 LNF Turbo, 304 Stainless Downpipe, RacePipe- TREADSTONE PERFORMANCE
i like... debating between this and Hahn's 3" catless dp. yours is a few $ cheaper. does your product come with new gaskets?
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Old 09-05-2011, 03:51 PM
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Well I have a question, I installed a Bad-Mab DP with the vibrant defouler a few months ago and all was fine until today, I threw a code. I have put about 600-700 miles on it since I installed the downpipe. Any suggestions?
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Old 09-05-2011, 05:35 PM
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Originally Posted by Prestige_Worldwide View Post
Well I have a question, I installed a Bad-Mab DP with the vibrant defouler a few months ago and all was fine until today, I threw a code. I have put about 600-700 miles on it since I installed the downpipe. Any suggestions?
from what i have read, the best option seems to be to get a tune w/ the 420 code disabled. if not, you are stuck having to reset the ecu everytime a cel comes on. for some reason catless downpipes and our cars dont get along too well. lol. hope this helps.
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Old 09-05-2011, 05:50 PM
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Originally Posted by reefer_roids View Post
from what i have read, the best option seems to be to get a tune w/ the 420 code disabled. if not, you are stuck having to reset the ecu everytime a cel comes on. for some reason catless downpipes and our cars dont get along too well. lol. hope this helps.
Thanks any idea how much would someone charge for a tune to just turn off the 420 code? I don't have an extra $400 for a full tune.
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Old 10-18-2011, 10:22 PM
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So where i live i dont need emissions i was wondering if i got a catless dp but didnt tune it would it be worth it sorry if this seems stupid ive driven trucks most of my life and never learned anything about tuning cars
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Old 10-18-2011, 11:56 PM
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If you already have an HP Tune, then get the cat less down pipe.. Do you still need a retune? What else can be tuned for after the swap if you already have a tune?
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Old 05-17-2012, 01:53 PM
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Im gonna buy a downpipe for my 2010 cobalt ss turbo, and my buddy has a bad downpipe on his 06 supercharged,,, will my downpipe fit his car?
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Old 05-17-2012, 02:09 PM
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^ i dont think so
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Old 09-25-2012, 07:18 PM
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Just for info, when i put my catless downpipe,my car have approx 10-15 more hp with trifecta tune.
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Old 10-28-2012, 09:42 AM
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I've done some testing of different DPs...
DP testing, the Ruthless Pursuit of Power - Chevy HHR Network
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Old 10-28-2012, 11:56 PM
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Originally Posted by Smoke_ss View Post
Im gonna buy a downpipe for my 2010 cobalt ss turbo, and my buddy has a bad downpipe on his 06 supercharged,,, will my downpipe fit his car?
nope
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Old 10-29-2012, 12:23 AM
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Originally Posted by dieselracer View Post
if you already have an hp tune, then get the cat less down pipe.. Do you still need a retune? What else can be tuned for after the swap if you already have a tune?
anything
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Old 10-29-2012, 12:30 PM
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Originally Posted by reefer_roids View Post
i like... debating between this and Hahn's 3" catless dp. yours is a few $ cheaper. does your product come with new gaskets?
I don't think any come with new gaskets.

I got a catted hahn and it was amazing looking. I don't drive in winter, so it still looks new.
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Old 10-29-2012, 01:35 PM
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my turbo xs came with new gaskets...its catted, if anyone wants to trade for a catless
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Old 10-29-2012, 01:58 PM
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^ If you're sensitive to smells don't do that swap as it won't be worth it haha.
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Old 10-29-2012, 06:13 PM
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i just wanna have the tractor sound...lol...my catted one with muffler delete sounds great though.
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Old 10-30-2012, 11:51 AM
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Originally Posted by AARON-SS-TC View Post
i just wanna have the tractor sound...lol...my catted one with muffler delete sounds great though.
Gut your cat and cut the factory resonator off.
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Old 10-31-2012, 12:24 PM
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true...good thinking....lol
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Old 11-04-2012, 03:07 PM
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lol or you could get the turboxs one. it's great with no hassle. lol
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Old 11-28-2012, 02:42 AM
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Quick question(from a noob). I'm hopefully getting tuned this saturday a couple hrs away from my location and was going to install my zzp catless dp but upon installation realized I was an idiot and didn't order any o2 bung for the rear o2 sensor. I read alot about how the rear sensor just detects the cat efficiency and won't make the car run rich or lean with out it, is that correct? I would like to install the dp, unplug the rear sensor(expecting cel), and possibly have a shop do the muffler delete option before getting tuned in a few days. Basically, if I unplug the rear o2 sensor, is that going to **** up my car driving 2 hours without it before getting tuned? Thanks.
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Old 11-28-2012, 11:03 AM
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Seem to remember reading something about 07's having a problem with the rear o2 being deleted.
Found the post
https://www.cobaltss.net/forums/tuni...ndomly-157926/
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Old 02-04-2013, 02:22 AM
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If I get an aftermarket catless downpipe will I need to get a tune? Or do anything to my car?
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Old 02-04-2013, 10:01 PM
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Originally Posted by RejeanSoucy5 View Post
If I get an aftermarket catless downpipe will I need to get a tune? Or do anything to my car?
Read post #1 of this thread...
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Old 02-19-2014, 12:35 PM
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i know this thread is a year old and this is a reach out....
i have a 2009 cobalt ss tc and am thinking of going with turboxs fl catback and the turboxs catless dp. are there any fitment issues or do they bolt right up?
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Old 02-19-2014, 01:17 PM
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No. Bolt right up.
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