I'm thinking of going with a Dynatech Power Cat but I want to know what the exhaust piping from the header to the cat is in terms of size. Is it 2.25 or 2.5? I think it is 2.25 but I am unsure. I am going to be swapping the exhaust components sometime next weekend to a full exhaust system from header back.

I am eventually getting a better header once someone gets off there ass and makes one

Going with a single exhaust system through DynoMax. Magnaflow is too quiet and flowmaster sounds weird on a supercharged application, on top of that is makes that nasty drone noise. My Z24 has one and it sounds bad ass but it's the drone that deterred me away from them.

Dual exhaust on this car is a waste of time if it doesn't achieve a certain HP. Mostly for looks. I want to make it look like stock but run like a raped ape.

 

it looks 2.5" up front, i know they claim its 2.5", but it looks to go to 2.25" back where it makes that sharp turn just before the axle...

 

actually chevy claims 2.5", the ideal size would be 3" imo, look into borla mufflers they sound mean and arent overly annoying loud.

 

The stock system on the SS goes from 2.5" to 2.25" right before it goes over the axel...But yea 3" will be best on the SS.... with a high flow cat and muffler along with a nice header as well....I say either Magnaflow or Borla!

 

Borla has no tone and magna flow is boring.

I want to go Dynomax because I heard it on a 2.2L ecotec w/o supercharger and it sounded like a Z28 Camaro. I was impressed.

Thanks for the info guys!

 

Dynomax and Magnaflow are basically the same thing exept dynomax are cheaper. I have ran both on my cars and they are no different.

 

Found out that the Exhaust piping from the header back is 2 1/2 inch pipe. Guy said you can't stick any wider piping from the header back. He recommened to keep the same piping and for an extra $10 to ditch the resinator. Not sure what that does.

The exhaust will cost about $250 installed. Opinons welcomed. I am just thinking of ordering it and doing it myself.

Dealership said it's ok to swap exhaust. Leave the CAT on though

 

bump, I want performance, my car begs for it. Why can't anyone fab up some kind of an exhaust system for these cars yet? They would be rich by now

 

this post has brought my IQ down a few points...

oh, and a resonator is just a bullet muffler (to keep the exhaust from getting a little too loud)
I wasnt aware that there was a resonator on any car stock...i thought pretty much every car used a 'regular' muffler, i dont know much about 4bangers though...

 

My Z34 has a cat, then a resonator, the a ypipe to 2 mufflers, well that was before it got all ripped off and new stuff put in, now there is just pipe, and 2 magnaflow mufflers, yay Manitoba with no smog regulations. I had dynomax and borla and did not like the tone on my car till i put on a magnaflow, nice low growl

 

2.5 Inch is more than big enough for our cars. The whole bigger exhaust thing is Ricer logic. The 2.5" is already adding top end HP with minimal TQ loss. My 360+HP Camaro SS uses a single 3 inch pipe, Stock was 2.75".

The only thing that is even resrictive in the entire exhaust is the muffler.

 

No they wouldnt becuase by the time they even made enough money to make it worht Fabricating and producing them everyone that wanted one would already have one.

For every person that bought a cobalt SS exuast probobly 50 honda civic owners woudl buy an exuast thats why there are 300 million civic exuasts.

 

I have good info just to let everyone know Corsa will soon be making an exhaust for the Cobalt SS just like they did for the NEON, they should be getting the R&D car within the next 2 weeks when they finish I will post pics an sound clps i will keep eveyone posted.

 

I hate civic owners with *** pipes, the ones that are super annoying. A guy flew buy us in a civic through an intersection really fast the other day and I think he smacked the bottom of his car on the pavement . Serves him right for having an annoying exhaust. I hope it fell off.

 

If you don't want your car to be too buzzy and LOUD sounding, better keep the resonator.

The resonator does not restrict the flow. It just helps to dampen the noise a bit.

And $250??? What the hell is he doing? I got the section of pipe by the rear axle that is 2.25" cut off and had it replaced with 2.5" making the entire system 2.5. Then had an oval Magnaflow 14" racing muffler put on it all for $149.

BTW- Magnaflows ******* rule!!!!! My RL sounds AWESOME with one. I've had several compliments on my exhaust sound.

 

Magnaflow does sound good I haven't heard a car/truck with magnaflow muffler(s) sound bad...My 03' Sunfire sounded so mean with the magnaflows I had on there....

 

Has anyone seen what the inside of the new GM mufflers look like?

I was kinda curious what is all in there.

 

What you quoted that I wrote is from my own experience. Yes there are resonator(s). Look at a WRX exhaust. Talk about resonator heaven. I think that car has two on there at least

 

Ricer logic is "Bigger the pipe and louder the sound..Bigger the gains" which is wrong in MANY ways!

With F.I. car it is better, from what I have learned, to have a large exhaust such as 3"...Im not sure if this is pertaining to all F.I. cars or strictly turbo'd vehicles...But from what I have been told and learned that 2.5" is suficient on most F.I. cars but 3" is better...but correct me if im wrong...

 

mmk, well, if you actually did know much about cars, the 4 banger sounding like a 'z28 Camaro' is total crap, i have never heard a 4 banger sound much like an LS1, which your 'z28 Camaro' possesses. I have admitted i dont know much about 4cyl. cars, like factory resonators (no american muscle car v8's in my book come stock with them) though, yes i have heard a good sounding WRX, (havnt been underneath one...yet) yet it was not v8 good...

also, you would have to note that Borla is usually the best sounding/performing exhaust for its price ($$$), Magnaflow and Dynomax are the same thing really...it doesnt sound like you know much to me...

 

There can be some real mean sounding 4 cylinders. i've heard tones that sound simliar to LS1's but obviously they don't go far.

 

The best exhaust for F/I cars is no exhaust. Meaning, the quicker the exhaust can exit, the better.

I currently have the entire exhaust system a 2.5". I'm not gonna go 3" though. I'm getting one of these instead.

http://quicktimeperformance.com/QTEC/index.html

I'm planning on putting it between the cat and the resonator. That way, it only has to go through the header and cat (which is pretty high flow stock BTW). Should be pretty ******* awesome and scare the **** out of some little rice boys as well as yield a decent power gain too.

 

not true, where the o2 bung is pressed in is a restriction point, and where it goes down to 2.25, not considering the header...

 

I had a monte carlo with a V-6 and it had a resonator from the factory i think most new cars do

 

The muffler is the only real restriction. Simple things like the 2.50" to 2.25" and a O2 bung aren't.

The stock Cat. Converter most likely isn't to bad either.

And also not all Dynomax mufflers are like Magnaflows. Only the Dynomax Ultraflo is straight through. Other than that Borla Pro XS, Dynomax Ultraflo and Magnaflows are all straight through designs.

Borla uses a perf. tube with heavy SS wrap and very little roving material

Dynomax uses a perf. tube with fiberglass roving material

Magnaflow uses a perf. tube with light SS wrap and alot of roving material