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I recently bought a 2014 GT with a Coyote 5.0 V8 that's Whipple supercharged. It has Stainless Works Long Tube headers, an off road X pipe with no converters or resonators, and I recently installed the Borla Touring Axle Back exhaust kit. It's still too loud for me. I don't want to lose any performance but want it quieter. Any ideas?