Fisch Moto Spark Arrestor USFS approvedUniversal muffler fitment (as long as tail pipe is round)Perfect for Dirt Bikes, ATVs, Enduro and other round tailpipes - see our sizing below.Will fit any circular exhaust with a tail pipe inside diameter from 19-45mm/0.748�-1.800�(5mm/0.196� increments, 6 sizes available)Good value for the dollar compared to other solutions on marketLess than 10 min. installation timeMade from stainless steelVery durable and easy to remove for cleaningHigh Quality component manufactured in BC, CanadaAll necessary hardware included for the install (Set screws, Allen key and Loctite)Fits Honda, Kawasaki, Husky, GasGas, BETA, KTM, Suzuki, Yamaha, Tenaci Wong, Sherco & More ( Find your size at fischmoto.com )USFS approved (USDA)Fits 4-strokes and some 2-strokes(please inquire)Maintenance every 6 months or at 100hrs for 4-StrokeMaintenance every 15hrs � 20hrs for 2-Stroke (failure to do so will result in reduced air flow)