Up to 12% more horsepower and 6% more torque (when used with Stealth Air Cleaner Kit) Deep performance rumble replaces stock whisper tone Race inspired Grand National endcap Removable dB reducer Meets J2825 sound levels (with dB reducer) Features stainless steel perforated baffle design All hardware included Made in USA!. MUFFLERS GN BLK FXFB 18-