CLEAN LOOKS AND A PERFORMANCE SOUND - MBRP SPORT SERIES, Quickly bolt on an MBRP Sport Series exhaust and enjoy the new deep tumble coming from your ATV or SXS. Slam the throttle for an aggressive sound, or cruise all day long without worrying about being obnoxious. This exhaust focuses on enjoying the trails and delivering a balanced tone.. ATV Exhaust System With Sport Muffler; Slip-On System; 1.75 in. Inlet; 4.25 in. Diameter Body; Chambered Muffler;. Reliable and Dependable Chambered Design. Bolt-on Installation. Mild Exhaust Tone, Increased Flow.. MBRP 04-09 Yamaha YZF 450 Slip-On Exhaust System w/Sport Muffler. Yamaha ATV. Slip-on system, w/ Sport Muffler. USFS Approved.. Sport Muffler. USFS Approved Spark Arrestor Included.. ATV Exhaust System With Sport Muffler. MBRP Exhaust ATV Muffler. Side By Side Exhaust. Chambered Muffler.. Exhaust Muffler. Sport Muffler

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