Baron Custom Accessories Big N Nasty Slip-Ons BA-1074-00 Big n Nasty slip-ons are a direct replacement for stock Blends directly behind stock heat shields for a seamless, one-piece look The sound is rooted in deep bass tones, producing a thunderous roar that is pleasing to your ears The large 4in tubing, with its inverted O slash cut, adds to the awe factor, leaving a trail of envy in your wake No EFI modifications needed