The most you can quiet it down is with either a borla xr-1 muffler or a Magnaflow bullet. I vote borla obviously, but know that no matter which resonator you put in there its still going to be very loud!
btw, you will have to cut about 3" off the intermediate pipe between the Y and resonator to fit a borla. The borla muffler is 20" long compared to the LM resonator's 16.5". Any you will have to either weld it in or get 3" band clamps because it is not a perfect slip fit.
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1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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