How to Deal with Excessive Interior Noise in the Car?
1 Answers
Remove the exhaust pipe and inspect it for cracks or holes; for very small holes, seal them firmly with aluminum foil tape. The muffler's noise reduction principle involves the proper combination of chambers and pipes. If replacing the muffler or repairing the exhaust pipe does not reduce the noise, consider switching to a straight pipe. A straight pipe produces a louder sound with strong resonance. You can reduce the noise by making the outlet smaller.