TowGMC
Full Access Member
Last year I removed the rear resonator on my Denali and just put in a piece of straight pipe thinking I'd gain a bit of performance and perhaps a nicer exhaust tone. Well after a year of putting up with the resonance in the 1800-2200 rpm range I'm sick of it and want to put the resonator back on. But the muffler shop that did the work for me threw away the old part. So if anyone has one they removed I'd be interested in it. Has to be a 6.2L because the pipe diameter is larger.
So others will know, I saw absolutely zero performance increase with the rear resonator off. And the exhaust tone was only slightly more raspy. But the resonance has been hard to live with. The 1800-2200 rpm range is right smack dab in the middle of the highway cruising range.
What's interesting is that the factory resonator was a solid pipe all the way through except for a small 'scoop' about 1" across that extended into the exhasut path to catch some of the exhaust. Hard to believe that very little bit of scoop can remove so much resonance.
So others will know, I saw absolutely zero performance increase with the rear resonator off. And the exhaust tone was only slightly more raspy. But the resonance has been hard to live with. The 1800-2200 rpm range is right smack dab in the middle of the highway cruising range.
What's interesting is that the factory resonator was a solid pipe all the way through except for a small 'scoop' about 1" across that extended into the exhasut path to catch some of the exhaust. Hard to believe that very little bit of scoop can remove so much resonance.