Will a TC/Coupe Exhaust system match the Sedan or do I need to go get it custom fabricated.. What setup works best? I will need a tune also I know that but..... I haven't found anything saying the length etc is the same for the sedan. I want headers too Havent found anything for the 2.0

 

You don't need a header....you would need a new turbo manifold and I doubt you will even need that with a stock turbo....

 

so should I just have the shop make me an exaust what muffler should I use etc ???? I think I am ordering the tune 2morrow

 

u ask too many questions while failing to use the search function.........as well u've come off as a total ******* to me in past threads............IMO, get a bong or joint and puff away for a few hours only reading threads instead of asking a million questions.........u'll get further with your car much faster than asking all these questions nobody wants to answer for the 50th time.........all IMO tho, just remember that

 

Honestly whats the point without a tune? I would get an HP tune....you need either HP tuners or the hand held tuner from Hahn that is $1000. Exhaust is pointless without the tune since it won't do anything but add some noise.

 

to answer your question, the coupe and the sedan exhausts have always been the same for cobalts. ask me if its different for the tc and i would tell you "i don't know, but i doubt it"

 

The stock exhaust is a stainless mandrel bent ~2.5" setup from the factory and that size should provide more than enough flow capacity for what the smallish turbo can pump into the engine. There's probably very little gains on moving up to a 3" catback piping setup. As for the stock muffler's restriction it would be easy to test. Go to the track or a dyno and do a few run/pulls with it on the car and then take it off and repeat the run/pulls. If the performance is very close you probably won't gain much if anything from an aftermarket muffler other than an altered and/or louder exhaust note. After crawling around under the car I'd place my bets that the stock cats are the biggest restrictions in the exhaust system for the power levels the K04 can support. Only time and testing will show if that's true.

 

Headers on a turbo

 

X2 - this guy is killing me!

 

yeah I don't run turbos so suck my left one till you make the right jeleous bitches. If I remember correctly I have seen headers on the NHRA Turbo cobalts that allow for more sensors so eat **** .

 

Dude, relax - words like that will get you banned!

 

No one else would care lol.

 

*cough*... *staying out of the battle*

I would almost bet my left leg they are the same.

In todays world of mass production on huge scales and keeping inventory of parts and such. They want as many parts to be interchangeable as possible.

I think the only thing different between the two cars would be the body. (all exterior dimensions match except height)

Having done custom exhaust and prefabricated exhaust. Well... custom is nice but you never know what sound exactly you are going to get. I did it and ended up going back to put in a different muffler and bigger resonator because the sound bothered me.

I'm really digging the Hahn's catback... (you could always add a downpipe too)

http://www.youtube.com/watch?v=aeuZocM6EaE

I know you won't get much out the bolt ons until you tune, but if money is of any concern I would get the bolt ons and then tune. That way you are only tuning once. That is if you are doing a custom tune.

 

You keep making yourself look even more dumb. Turbo cars do not have headers they have turbo manifolds. Your turbo is bolted to the exhaust side where as our supercharger is bolted to the intake side so we need headers to release the exhaust gases.

 

On the subject of "headers" and exhaust manifolds, there are different manifold styles for turbocharged applications. You could have a simple log style manifold, an unequal length runner manifold, or an equal length runner manifold which is what you might occasionally hear being called a header style manifold (mostly on remote or side mount turbochargers installations common in some drag cars). All styles could potentially be a tubular welded construction or cast like our stock manifold. There's other minor variations such as the collector design (where the runners come together) which are split into two groups on the LNF because of our twin-scroll exhaust housing on the stock turbocharger.

If you're thinking of a conventional 4-into-2-into-1 header (manifold) for a naturally aspirated four cylinder application that bolts to the head and attaches on the opposite end to the downpipe, cat, or rest of the exhaust system then, no, we don't have one and can't use that type of header/manifold like the older supercharged LSJ cars because the turbo has to attach and sit between those two points in the exhaust system on our cars. For a turbocharged application like our stock setup, if you install a giant aftermarket turbo some day you might end up replacing the stock exhaust manifold if it can't flow well enough to support the flow requirements, but for a stock turbo car you common exhaust upgrade paths for the exhaust side of the engine usually include things like the down pipe, cats, and the catback tubing and resonator/mufflers (depending on the particular car).

 

They are not called headers they are manifolds no ifs, ands, or buts about it. There are different styles but in the end the name is the same. He just made himself look like a jackass by using the wrong terminology and then going off on other people. He needs to research before making himself look dumb again.

 

Chances are the SEDAN needs a slightly longer mid pipe to accommodate the 4 door. I ordered an exhaust for my sedan years back and it was not the same as the coupe model. That is NOT to say that this holds true for the SS however. I would get on the phone and call some vendors and put an end to this thread

 

I thought the cobalt coupe and sedan were the same size, with the sedan having shorter front doors to accommodate for the rear doors.