I recently had a Magnex downpipe, Magnex decat centre and Remus back box fitted, and annoyingly its knocking when under power and over bumpy roads... anyone else had this? Have had it checked, and the downpipe 'curved' a little to prevent it hitting the cross member under the transmission. Is it hitting the rear axel? The noise is very difficult to isolate where its coming from, so wondered if anyone else had experienced this. Its a UK MY 98.
I was considering the powerflex bushes as a possible solution to prevent so much movement... comments welcome

Cheers

Necromax

 

My Scoobysport backbox knocked on my towbar.. I just ended up putting cable ties through the rubber mounts on the left hand side on the exhaust mount end and right hand side on the car part of the mount and visa versa stopped it going let to right and knocking on the tow bar. That was knocking on left and right hand bends roundabout etc.. not on acceleration though..

JGM