Severe Exhaust Drone with Free Flow Cat Downpipe

theblackanvil · Post by **theblackanvil** » 04 Jan 2013, 23:29

Recently installed a Viva Performance 3" down pipe with a free flow cat (very similar to IPD) on my 2004 V70 and I am getting a very nasty exhaust drone from it at approx 2400 RPM's. Tried weighting it but that hasn't calmed it down much. Anybody with a similar install having exhaust drone issues? Thanks.

Post by **jimmy57** » 05 Jan 2013, 07:29

How is the pipe resting on the front mounts?
The P2 exhaust system is supposed to rest on the mounts at the front to free the flex section and reduce that drone.
I just installed a DP on my 2004 V70R which is similar if not the same as your pipe and it has no drone.

theblackanvil · Post by **theblackanvil** » 05 Jan 2013, 09:31

Jimmy57, thanks for the response. I'm not sure now. I will check. What type did you install?

theblackanvil · Post by **theblackanvil** » 05 Jan 2013, 12:20

The downpipe hanger rods are in the bottom holes of the rubber mounts. The downpipe is very snug. I doubt that front mount does anything to help suspend that downpipe.