freeunit

I recently put on a Mac o/r H pipe and it never rattled but now it is rattling. I took it to a shop to get all tightened and then it was fixed for a week or so. Now it is back. should i get new nuts or something it is horrible. Its almost embarrising.

let me know if you have any ideas.

anything helps. willing to try anything

98GTstang

I'd put the car on 4 jack stands, get under neath it after making sure its safe to get under and see if theres anything touching metal. I know my pipes were slightly touching the frame all i did was take a pry bar and bend it away from the frame..just look for something that would make a rattle and bend it alittle

04GTMustangRob

I have a little of the same prob. but I am taking mine to a local mustang performance shop to get it fixed. they said that they see it all the time with shops not knowing what they are doing. but who knows.

freeunit

see i dont think it is rubbing anything because i took it to a shop and they tightened the bults but now they are loose and rattaling again so i dont think its touching any other metal.

Matts00GT

Well if the bolts are loose again, you could try putting some loctite(sp?) on the bolts to make sure they don't loosen up again. I'd try that.

freeunit

ya well i think the shop i took it to tried that and it started to rattle so that kind of makes me think it might be hitting some other metal

sprostang

Make sure all the welds on the whole exhaust system are good. If a weld breaks, your exhaust will make a rattle. Some part of the pipe may have pulled away and is hitting somewhere. Check where the pipe goes over the rear axle. Ive seen where someone used the cheap clamps that come with a catback to connect pipes instead of welding, and the pipe pulled out and was bounceing around on the axle. If that doesnt seem to be the issue and the bolts are loose, I would suggest putting lock washers on to keep the bolts from loosening up again.