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post #1 of 15 (permalink) Old 03-30-2014, 04:05 PM Thread Starter
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Headers

Does anyone have any ideas on good aftermarket headers that would be good to stick in a 2006 chevy cobalt lt coupe?
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post #2 of 15 (permalink) Old 03-30-2014, 05:21 PM
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ZZP is probably the most well known manufacturer of aftermarket headers for our cars, and arguably the best as well. They offer three different types for the 2.2s; shorty, midlength and longtube.

Shorty - good low end, weak high end
Midlength - moderate low and high end
Longtube - weak low end, good high end

You'd also need to consider the cat options (400, 200 and catless) for your downpipe and whether or not to have a wideband bung installed.

Downpipe and Catback Exhaust Systems | Cobalt SS & GTP Performance

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post #3 of 15 (permalink) Old 03-30-2014, 06:35 PM Thread Starter
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Is the EGR sensor on the stock manifold?
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post #4 of 15 (permalink) Old 03-31-2014, 08:48 AM
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o2 sensor?

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2007 Cashmere Metallic Chevy Cobalt LT Sedan...totaled 04/11/2011
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post #5 of 15 (permalink) Old 03-31-2014, 05:26 PM Thread Starter
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no the EGR sensor detects exhaust gas flow through the EGR passage which can be located in a bunch of different places on the exhaust. Does a cobalt have the port on the manifold or somewhere else?
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post #6 of 15 (permalink) Old 03-31-2014, 05:32 PM
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I don't think it has that at all...

2009 Cobalt LS XFE (F23) Victory Red
YYZ V.3 Springs, Koni shocks/struts, Powell XXX rear swaybar, Brembo brake swap, 5 lug conversion, Ion Redline wheels, SS/SC interior swap including power conversion, K&N intake, Trifecta tune, Ark Performance N-II catback, Ark shorty antenna, SS body kit, Powell F23 rotated mount, LNF rear mount, Powell CABs
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post #7 of 15 (permalink) Old 04-03-2014, 04:47 AM
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The older cavaliers used EGR valves to reduce emissions. Cobalts don't use them. If you want a decent looking header, zzp makes the best bolt on.

2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille
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post #8 of 15 (permalink) Old 04-03-2014, 05:50 AM
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Keep in mind the only thing you MIGHT be gaining is sound. You will not notice any performance gain.

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post #9 of 15 (permalink) Old 04-03-2014, 06:02 AM
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Quote:
Originally Posted by BankerBalt View Post
Keep in mind the only thing you MIGHT be gaining is sound. You will not notice any performance gain.
agreed, it wont gain you much pickup, you need to have the exhaust flow balanced with no choke points and obviously a pcm tune to get that engine pumping more air. You may feel on a shorty header a lower quicker pickup, but nothing to really gain much power. Maybe a few ft lbs tq, but nothing more.

2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille
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post #10 of 15 (permalink) Old 04-03-2014, 06:15 AM
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With my current bolt-ons (CAI, Midlength header/DP and catback) and no tune, what I noticed is a loss of low end torque. Where the car used to pull well in it's 4k rpm sweetspot, it now feels a bit limp. The trade-off is past that, it pulls much better than stock all the way to redline. So it's almost as if my powerband has moved up. I know she's making a little more hp/tq, but not by very much.

'07 Eclipse GT build thread - 280whp, 254wtq
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