Bad Exhaust Install?

Just got a full exhaust put in. Supplied my own headers and cat. Got a 2.25 mild steel made up for the rest of the piping.

Everything seems alright but whenever I rev to 2000rpm - 2500rpm it starts making this rattling/vibrating noise. I can't pinpoint exactly where it's coming from but it kinda sounds like from the middle or the back.

Should I take it back cause it's a bad exhaust install or does something need to set in after the install?

could be ur exhaust hangers, or that the system was designed to close to the chassis, meaning when it hits a certain rev, it vibrates to much hitting the belly of the car.... look under the car to see if theres enough clearance... chances are they didnt do a proper job, cause no exhaust should be

Thanks for the response, I will try to contact him tomorrow and get the car in. Keep the suggestions coming so that I know what else to look for...

If you can, film/record this noise for us to diagnose. I still think you lack information for us to determine the problem, but yeah bring it back to there workshop to sort it out. Shouldnt be a biggie

i had the exact same thing, installed a hi flow cat, everytime the rev dropped down to 2k revs, mad this deep "gurr" kind of noise... never fixed it, left it as it was..

so its probably ur cat if its the same thing. go back and tell em to fix it... i had a small hi flow metal cat design

on the day i got it done, i thouht it was the muffler, took it back to them, they couldn't diagnose or figure out why.... only a few weeks later i relized it was the cat... then cbf to go back

Might be a long shot but you running a ASR and BEAKS? If so it might be hitting against that, that's what happen to me.

Nah not running ASR or beaks. I got it booked in for them to have a look on Saturday so hope it's a quick fix cause it's quite loud & annoying!

I've recorded the sound but don't really know how to upload it onto here...

also check heat shields, i took mine off cause my aftermarket exhaust was touching them sometimes.

Record noise with portable camera such as mobile phone or digital camera. Most of them are able to record as video (w/ audio included).

Then upload to Youtube.

Then link here or embed.

Maybe the exhaust itself isnt position/angled properly so im guessing when it expands it come in contact with the sway bar.

Check the B pipe as it goes over the rear control arms, maybe its hitting there ?

Thanks everyone. I've recorded a clip and it doesn't sound anything like what I'm hearing. You can't really hear the rattling amd vibration.