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I have an AEBS header with stock exhaust. All heat shields from the cat aft remain in place. From the day the header was installed, I noticed a resonance at certain RPM's *under acceleration*. At first I thought it was the header. After checking each month to ensure that all bolts are tight, thumping the collector, flex-pipe, cat, and b-pipe, I know that nothing is rattling loose. However, I noticed how THIN the heat shield ABOVE the cat and b-pipe is. Man, it feels like tin(though it's probably cold-rolled galvanized). Anyway, I am considering spraying this shield with an underbody coating, or some other high-temp, grime-resistant material. This should eliminate this LARGE, amphitheater shaped piece from resonating.
Anyone have a similar experience? If so(or even if not), any suggestions? I'm all ears, as it were.
Anyone have a similar experience? If so(or even if not), any suggestions? I'm all ears, as it were.