MBRP 87-97 Yamaha YFM 350FW Big Bear Moto-4 4x4 Direct Replacement Slip-On Exhaust w/Utility MufflerPerformance 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. This Part Fits: Year Make Model Submodel 1987 1999 Yamaha YFM350FW Big Bear 4x4 Base 1993 1999 Yamaha YFM400F Kodiak 4x4 Base