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In revisiting my old posts, I realized I never posted my solution to this problem.
I had used the included gaskets with the headers I installed, not realizing they were basically crap compared to the proper OEM gaskets that are stamped sheet metal designed to fit the stock exhaust ports/channels. The noise was fixed by installing new OEM exhaust manifold gaskets, and besides some light raspiness when cold the exhaust sounds great when warmed up.
I'll post a startup and driving video here soon.
Lesson learned, use the right gasket the first time.
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2001 Base 2.7l, 5-speed (124k) - LN IMS kit
- TopSpeedAuto exhaust (headers/mid/muffler)
- 997 Carrera III wheels w/ECS spacers 18x8 +15mm/18x10 +18mm, Eibach springs
- FunctionFirst shift knob/short shift kit
- Focal speakers/Alpine amp/Kenwood deck/Pioneer 8" subs
Last edited by FoFoJoe; 02-08-2022 at 06:20 AM.
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