Review on Walker 21684 Quiet FlowSS Domestic Muffler by Bob Walters
Replacement Muffler for the Yukon Denali
Installed on my '08 Yukon Denali expecting it to be quieter than the stock muffler or equivalent but it wasn't. Actually louder and has a very annoying hum at highway speeds. This replaces the expansion tube and resonator assembly. Walker's claim that it meets standard noise levels doesn't hold true in my testing. The noise level in the cabin before the replacement was 73 dB at a speed of 100 km / h, and now it is 75 dB. I'll be back in stock soon.
- Exhaust and Emissions
- No Auto
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