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

All You Need to Know About Downpipes

Old 12-27-2009, 08:37 PM
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^ My bad thanks for the heads up Terminator2
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Old 12-28-2009, 10:56 PM
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Originally Posted by Vee's SS View Post
Were on the downpipe should the wideband O2 Bung get welded. Before or after the CAT?
Why would you need to put a 2nd wideband 02 sensor on? The stock sensor is a WB...
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Old 12-29-2009, 08:53 AM
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sooooo which downpipe should I get?

Should I create another thread with a poll?

Originally Posted by Terminator2 View Post
Before the cat. If it is installed after the cat it will show leaner than actual A/F.
correct. Always install BEFORE the cat since the cat cleans out some of the mixture for emissions and a cleaner air mixture

Last edited by wantedSS/TC; 12-29-2009 at 08:53 AM. Reason: Automerged Doublepost
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Old 12-31-2009, 03:44 PM
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Could a mod please let me know what I need to do to this thread to make it a sticky?
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Old 12-31-2009, 05:26 PM
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Just pm a mod and ask them if they think it's worth a sticky. If they think it is, which it is, they will sticky it for you.
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Old 12-31-2009, 05:43 PM
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Originally Posted by IdreamofYenko View Post
Just pm a mod and ask them if they think it's worth a sticky. If they think it is, which it is, they will sticky it for you.
How do I know who a mod is? lol
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Old 12-31-2009, 05:55 PM
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It will say it right under their username. BlackSS/SC06 and ReignSS are around a lot. Just shoot one of them a pm I'm sure they can see that this is sticky worthy.
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Old 12-31-2009, 11:16 PM
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Does this apply to all cobalts or just the SS/TC cars? What I mean is, do all cobalts have 2 cats?
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Old 12-31-2009, 11:26 PM
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Originally Posted by tom.g View Post
^ My bad thanks for the heads up Terminator2
You may not be wrong. Putting the o2 before the cat or too close to the turbo is not a good idea either unless you have a heatsink made for the sensor. Too hot of an exhaust gas will fried your o2. This was from past experienced.
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Old 01-01-2010, 05:23 PM
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Originally Posted by IdreamofYenko View Post
It will say it right under their username. BlackSS/SC06 and ReignSS are around a lot. Just shoot one of them a pm I'm sure they can see that this is sticky worthy.
Ok I'll send one of them a PM, thanks!

Originally Posted by LTBALTBMX View Post
Does this apply to all cobalts or just the SS/TC cars? What I mean is, do all cobalts have 2 cats?
Not sure about the other Cobalt's but this downpipe thread is specifically for the SS/TC cars however some of the information is common to all downpipes.




PS: Thanks for the info blrt that's good to know.
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Old 01-04-2010, 10:13 AM
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correct me if I'm wrong, but our cars idle high at first in order to warm up the cat's right? well what happens when there aren't any cat's?
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Old 01-04-2010, 10:17 AM
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what are the chances of passing emissions without a cat, or res but with a muffler haha
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Old 01-04-2010, 10:19 AM
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Originally Posted by blk06ss/sc View Post
what are the chances of passing emissions without a cat, or res but with a muffler haha
Visual or an actual sniffer test?
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Old 01-04-2010, 10:26 AM
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Originally Posted by TurboTechRacing View Post
Visual or an actual sniffer test?
i may of worded that wrong .. to pass inspection
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Old 01-04-2010, 10:51 AM
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Originally Posted by rdskin21 View Post
correct me if I'm wrong, but our cars idle high at first in order to warm up the cat's right? well what happens when there aren't any cat's?
It does the exact same thing. Cat warmup cycle. And it's loud as ****!
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Old 01-04-2010, 10:52 AM
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great info. +1 rep

under advantages for catless, you forgot to write that it sounds damn sexy
i love mine.
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Old 01-04-2010, 10:56 AM
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Originally Posted by interviewatruins View Post
great info. +1 rep

under advantages for catless, you forgot to write that it sounds damn sexy
i love mine.
x2 ^^^
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Old 01-04-2010, 07:17 PM
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Originally Posted by rdskin21 View Post
correct me if I'm wrong, but our cars idle high at first in order to warm up the cat's right? well what happens when there aren't any cat's?
Same thing happens the car is just very loud for the first 30sec to 1 minute. Then the sound calms down to a nice gurgle.




Originally Posted by blk06ss/sc View Post
i may of worded that wrong .. to pass inspection
You will not pass inspection if you go catless and your state/province requires you to have a cat. If you really want catless but your state/province has laws against it you will have to switch the downpipe back to stock for every inspection.




Originally Posted by interviewatruins View Post
great info. +1 rep

under advantages for catless, you forgot to write that it sounds damn sexy
i love mine.
Originally Posted by JPizzle View Post
x2 ^^^
Added
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Old 01-06-2010, 09:31 AM
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This its sticky yet?!?

What is the policy in US and other than Qc provinces concerning inspections .. cuz here in Qc we don't get our cars inspected .. unless the police man stops you .. but can they really notice that you are catless?
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Old 01-06-2010, 06:14 PM
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Thanks guys, I didn't know if the car measured the temp or anything. So I was thinking the car would be like WTF where are the cats? lol I haven't been under the car or knew if there was a sensor or w/e for that. and this should def be stickied btw!
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Old 01-08-2010, 08:45 AM
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bump
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Old 01-08-2010, 09:02 AM
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for inspection, if u switch from the catless back to stock, would it throw a code anyway? or you would deff be good, cause im gonna get it ha
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Old 01-08-2010, 10:09 AM
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I don't see how going back to a stock DP could throw a code, but I'll let somone else confirm that aswell.
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Old 01-09-2010, 07:39 PM
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Where are the videos!?!?! Im trying to decide whether to go catted or catless and need some comparisons....
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Old 01-09-2010, 08:48 PM
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Originally Posted by 80vetteL82 View Post
Where are the videos!?!?! Im trying to decide whether to go catted or catless and need some comparisons....
if you are running the stock exhaust, you will barely even notice a differnce in sound even with the catless. It's actually surprisingly quiet, and you will definitely pickup more gains with the catless
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