Exhaust Knocking on Mount

[Karlos182]

Help! I had my cat replaced by Renault last week, and now the pipe between the cat and the spilt into the two backboxes is knocking into the mount, resulting in a nasty resonating sound at high revs, and when changing down. It's actually the steel hanger on the pipe hitting the bolt that holds the rubber hanger onto the car. I've enclosed a piccy to clarify. It's a blueflane exhaust. Any ideas on how to solve this? Thanks.

 

[edde]

You have to get under the car or get it on ramsp to see where its badly installed or been knocked.

 

[Karlos182]

Already done that, which has led me to post the above.