It vibrates all the time (acceptable), but its worst at 25mph (really annoying); it gets better after 30mph. Where should I start to look? ---------------- Another annoying thing is that an exhaust leak almost sounds more than the nice v8 sound in the back. I havent located it fully, perhaps the heat riser valve, or between header and engine head. -I have read about its hard to stop leaks there, might need to let someone level both the head and header But tips and tricks would be appreciated; I think these are common problems. Thanks
For the vibration, I would look at the back tires first. Have them balanced and checked for runout. Low speed vibrations are almost always from the rear.
