i bought my 07 ss/sc a month ago and ever since when im in 2nd gear accelerating past 2000RPM i get a rattle. So i was under the car today shaking the exhaust to find where it was hitting and couldn't find anything, so i gave the resonator a good hit and it sounded like a pipe on the inside of the resonator was just flopping around and im not expert but i think those should be soild and no loose parts or piping inside of it, and if this means my resonator is bad what should i replace it with, a stock or possibly a magnaflow resonator, im trying to stay budget friendly because i will have to get it welded in at a shop, thanks for the help guys and the car is stock except for an air box mod.

 

im looking to get the Magnaflow 10426 its 2.5 in/out and an 18" body and 24" overall length, has anyone else ran this resonator on a virtually stock ss/sc cobalt?

 

well i got the magnaflow resonator in and its a lot more solid than the stock one, im gonna have it welded in when me new tip arrives and then i will update with results.

 

Sounds good. I got a magnaflow bullet on mine then just straight pipes and a y at the end for dual exhaust

 

Those Magnaflows burn out after about 20,000 miles. Should have replaced it with a OE resonator as those tend to last the longest. Some factory ones rattle, mine included. I just havent gotten around to replacing it yet

 

well i didn't get any responses on this thread so i just went with the magnaflow, i got it for $60 shipped and its brand new so im not sweating if i have to replace it down the line.

any idea if it will change the exhaust sound at all?

 

it should make it a little deeper then stock

thats the same one i have on my car. but i am far from stock

 

sweet a little deeper would be nice and no more rattle... i cant wait lol

 

installed\ my magnaflow resonator today and the horrible rattle is completely gone and now the car is a little quieter on start up which is cool. very happy with it besides the fact the guy welded the resonator straight to the downpipe and not on the flange but ohh well.

 

Thanks for your post. Mine is doing the same; did a search and found this. I'm ordering the same part you did. Thanks OP

 

Follow up:

Replaced my resonator, with the magnaflow, all is good now! The stock resonator broke loose inside, causing all the rattles.