Direct Replacement Slip-On W/Utility Muffler Requires Head Pipe To Be Cut For 89-91 Honda TRX 300 FourTrax all models MBRPPerformance Sound In A Simple Package Directly replace your OEM muffler with an MBRP Utility Series exhaust, and hear the voice your ATV or SXS should have had from the factory. Fitment: 1989 1991 Honda TRX 300 FourTrax, All Models Product Info: ATV 7000 Series Utility Muffler Black Coated Required Head Pipe To Be Cut For Installation 12. 15 Inch Body Length 3. 5 Inch Body Diameter 1. 25 Inch Inlet ID Hardware Included Chambered Muffler Improved Sound