Quote:
Originally Posted by Finnegan
Aftermarket X pipe or cans?
If so it's probably hitting the reinforcement plate. Heat (expansion) moves things ever so slightly and stops the sound. The reinforcing plate mounts and X pipe alignment are tricky. I've had mine off several times--the last created the issue you have. Small tolerances IMO.
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Exactly what I'm thinking.
RE section 1 and cans, stock X-pipe.
Either it's bumping something that I haven't located yet, and stops bumping it when it heats up and grows, or it's a resonance that goes away when it grows and the stresses change.