I've been trying everything I can think of to track down a frustrating resonance like rattle that seems to have started a few hundred miles after installing a new exhaust set up. The previous fabspeed headers are retained with a CPI/BM rasp terminator, supersprint resonated xpipe and Eisenmann race mufflers. There was an annoying metallic rattle on cold starts that seems to have gone away but a similar like sound has returned when the exhaust warms up in the 2700rpm range. I've replaced all exhaust hangers and thoroughly have checked that the headers/exhaust clear all heat shielding. Does this potentially sound like a failing resonator (wouldn't rule out manufacturing defect causing premature failure)?
I've attached a video clip showcasing the sound. Oddly enough, replacing engine & trans mounts seems to make it more prominent on cold start idle. It’s definitely related to thermal expansion.
I've attached a video clip showcasing the sound. Oddly enough, replacing engine & trans mounts seems to make it more prominent on cold start idle. It’s definitely related to thermal expansion.
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