No. I dont have testpipe hangers installed. They would not help though as fitment was very challenging and the exhaust is very rigid. The problem is probably my mix and match system. AMS DPs, SZ TPs, Z1 H-pipe and greddy exhaust. I will note that with AMS TPs and the stock mid section everything fit with a few mm clearance. It is the combo of the SZ TPs and the H-pipe that is making things hard.