Kolpin Stealth Exhaust 2.0 with Heat Shield - 53570 Used in conjunction wit your stock exhaust system to reduce noise by up to 5-7 deciblels with no loss in performance High flow/low resitriciton muffler uses baffled design - no packing to burn out; No vehicle modifications needed in most cases Fits most four-stroke ATV/UTVs; Dimensions: 12-1/4" long x 4-1/2" diameter Honda & certain other flat or concave OEM mufflers may require an additional adapter (item 53520 sold separately) Does NOT fit John Deere XUV 550/850, Yamaha Viking, Honda Pioneer or 2014-Current Polaris Rangers due to larger exhausts