I'm hearing that some of these downpipes with the cats like the Cobalt Addiction downpipes or even the ZZP downpipes have cats that rattle Is this true? How are they working out? Thanks...

 

bump

 

The downpipe I just got from zzp sounds really bad. I dont know if its a rattle or what but hopefully it goes away. Hope this helps

 

Yeah it helps, thanks. The more info the better. That doesn't sound good though.

 

I have the cobalt-addiction one and it never rattled, no whistle, nothing.,.. sounded great since day one....

 

Dont get the header either from ZZP it didnt even fit. Check out post # 25 this person had the same sound I think as mine but later in the thread I think it starts to go away.
https://www.cobaltss.net/forums/show...t=zzp+downpipe

 

To save you some time then go to post # 31

 

yours didn't fit either.. huh.... the header looked pretty shitty internally anyway.... wait on cobalt-addiction... we're working on designing a new header downpipe combo.. I"ll keep you guys posted... also they designed a new h/c setup... hopefully doin the install this friday, then he should have 9 more kits available after this week.... (Iget to do the prototyping for you guys)... just watch for either mine or badg1rls posts.

 

Those cheap converters do have some sound issues and tend to make all types of noises. They are using a car sound or something similar. Hence why we chose Random Tech. Quality, fit, finish and all for one price. No worries or complaints. We sold their cats to blown C5s, C6s, Vipers, Lambos, Elises..............Good enough for them, good enough for anyone.

 

Ya mine sounds like **** right now. I wouldnt recommend it. If it doesnt get better in 1000 miles its coming off.

 

Sweet this is all good stuff to know. So ixney the ZZP downpipe.
I know Dezod stuff is quality. You get what you pay for.
I might just skip the downpipe and get a high flow cat with the GM manifold and exhaust.
The downpipes are expensive.....

 

Ya dont be the test dummy. Look at me $550.00 dollars later and I got nothing good to show for it.

 

I trust cobalt-addiction/.... quality stuff from them, trust me their downpipes are good and not that expensive... since they are made in house per order.

 

That realy sucks bro. I'm trying to stay as GM as possible like GM manifold w/ GM exhaust and a high flow cat, nothing aftermarket fits right. I just don't get it!

 

If zzp cant send me a new header really soon then I will get a refund and get the GM Manifold. With Gm parts you know there going to fit and be good quality.

 

hmmm.. i dunno, i would like a downpipe to finish my setup but i dotn want issues ...gosh!!!@

 

The downpipe fit perfect and looked really good, but its making a funky ass sound. I'll let you guys know if and when it go's away.

 

Do you guys not have a muffler shop in town or something? Go get a custom header made w/ 2inch primaries and long tubes in mild steel. After they make the header, coat it yourself for about 50 bucks for the parts, then get it bolted on. After intalling that, buy a Random Tech hi-flow 3inch cat and have the same muffler shop weld that cat on the car. 3inch cat-back would also be needed and I recommend using Thermal or Hahn in that department. Between those parts and a nice CAI you should easily see 20+whp which I think is a VERY conservative figure. Realistically something like 30+whp, especially if your boosting 15+psi. The car is boosted, it's going to love high flow exhaust, period.

 

you should put up a post to see who';s running th c/a downpipe combo.... I know of 4 people in my area who have it not including me and their was no rattle or noise... plus thier setup is pretty cheap... w/different options... trust me on this one..

 

Cheap hah? I'm all about that. What kind of setups were they running?

 

three inch w/ cat or no cat or 2.5" w/ cat or no cat.. my friend got the 2.5 no cat and it sounds pretty good... I got the 3" w/cat and it sounds good too... but I"ll be finishing off with their 3" catback when its ready.

 

I got the ZZP with cat, and it did sound really fuzzy for about 3 weeks but it did go away after putting some miles on it and the gains are good too!