I'm looking for more power without all the noise. I already have a catted downpipe. What some of your experiences with all of the 3 inch exhausts out there? I'm interested in the most quiet one.

 

mpx or hahn. regardless they are all pretty quiet. this car is hard to make loud

 

that^

to be loud, you pretty much need a straight pipe. lol.

 

Or have your old catback lol

 

not only is not hard to do but cheaper.... straight pipe. Also if you have a catless downpipe, you'll definately have the cops ears

 

my hahn with a cia 3" catted dp is barely louder than stock

 

i never had cops ears and i was catless with a muffler delete and a magnaflow resonator. 3" all the way back. it was loud at startup that was abuot it. im switching to a new setup though.

 

My zzp catless dp and there 3 inch catback isn't loud at all, only at start up thats it.

 

quietest probably mpx or stock.

 

Hahn is by far the quietest.

 

VIBRANT lol

 

The quietest setup we had was the stock downpipe and the Hahn exhaust. It was maybe 10% louder than the factory setup.

The loudest setup we have had was the MPx downpipe without cat and MPx exhaust. It was about 35-49% louder than stock.

Our current setup is MPx downpipe with cat, and Mpx exhaust and it sounds GREAT. Plus no banging on the rear axle when we go over bumps in our lowered Cobalt !

If your interested in either Hahn or MPx, we keep both in stock at MP.

 

What is quieter though,

mpx/hahn downpipe WITH cat and mpx exhaust

or

mpx/hahn downpipe WITH cat and hahn exhaust

 

I'm gonna say that the hahn dp with a cat and a hahn catback will be pretty quiet

It doesnt matter what we do to these cars, our exhaust will still be on the quiet side

 

Anyone have the ZZP exhaust? It says its the same Db level as stock.

http://www.zzperformance.com/cobalt_...1126&catid=187

 

I have their catback and catless dp and its not that loud only at start up after sitting awhile

I love the sound of mine, and the muffler on zzp's setup is not as straight through as the stock one

^ so that might also be a reason why its not as loud

But if you didnt wanna drop that much cash I would just go with zzp's dp and leave your stock catback

 

What will the upper and lower charge piping do for the car? I see it in your sig

 

I have the Hahn exhaust with a Hahn catless dp and I have the resonator cut out of the catback. It's still pretty quiet. Gurgles a lottt but it's not too loud. Only on a cold start. Sounds awesome though.

 

3" straight pipe no cat. AKA: 'The fencepost' exhaust.

 

have an muffler shop put you together a 3inch cat back, or just the axle back (cheaper) option

and yes Vibrant like said above
jk
turbo cobalts dont get loud they get sexy

 

I have the Hahn catback with the CIA CATTED stainless DP and it's a little louder than stock, and it's really only loud on startup and between 2500k-3500k. Hahn exhaust with any Catted DP is going to be your best option if you're looking for something quiet.