before i post, i'd like to say that i know that this is a very simple/primitive fix, and i am not sure of whether this has already been posted or tried out. i just want to put it out there.

my HKS exhaust used to shake like crazy over bumps or cracks in the road, even with the HKS hangers that were included with the exhaust. friends who drove behind me would always tell me about it. i hate my car looking cheap or shoddily put together, so when i took my car to get the 4.77s installed, the guy tightened some hose clamps around each hanger. the exhaust now stays in place over any inconsistencies in the road.

if you have an HKS exhaust, your exhaust shakes when you go over any inconsistencies in the road, whether you've seen it or not. go pick up some hose clamps that can fit around the hanger and fix that shake

 

Nice fix, wonder how it holds up on a race track.