I'm curious if anyone else has had this problem:

I had a Magnaflow catback installed= No problems

I installed Progress Antisway and perches= No problem (sort of [long story])

I had progress lowering springs installed= Problem

I have a knocking noise coming from passenger side rear, I investigate and discover the hanger, twards the center of the car, by the muffler, is hitting the antisway bar. So I go to the muffler shop that installed the exhaust and they decide that the only way to fix it, without voiding my warranty with Magnaflow, is to bend the Mitsu hanger to come down in front of the antisway, and not hit it. This has made things better but I still hear a more faint knocking sound when driving over curbs and such. So there is still a problem. My question is, has anyone else had a problem with this combination of modifications, or could this be an indication of another problem? Anyone with some insight?

 

Well since the original knocking noise issue was resolved... Have you checked to see what else it could be that is causing the sound? Maybe your spring isn't sitting flush w/ the bump stop.. have that checked out.

 

Thanks, my springs, on both sides (pass, driver) at the top dont appear to be sitting flush in that seat, they are cocked just a little. Think that might be the cause?

 

yes, they must sit flush...