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4-Stroke Exhaust4-Stroke Exhaust

4-Stroke Exhaust from Rocky Mountain ATV/MC

Exhaust systems in either full race or with tuneable spark arrestors and different tips to give you that perfect power output for either motocross or trail riding.

Latest Dual Sport 4-Stroke Exhaust Reviews – You could win up to $500 for reviewing products!

  • Lexx MXe Slip-On Silencer With Mid-Pipe

    Lexx MXe Slip-On Silencer With Mid-Pipe

    Sarah in MI

    Passes sound testing!

    Very happy with this slip on, especially for the price! Switched from my HMF due to the implementation of sound testing and passed with my highest test at 96 dec toward the end of the season.

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  • Yoshimura RS-4 Stainless/Aluminum Full System

    Yoshimura RS-4 Stainless/Aluminum Full System

    Colton in NV

    excellent

    easy to install all around amazing pipe good quality and the extra power is always good also.

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  • HMF Racing Competition Series Silencer

    HMF Racing Competition Series Silencer

    Brett in UT

    Slip-on

    it only fits the stock head pipe. more info would have been nice. It didn't say that it was a slip-on.

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  • Yoshimura RS-4 Stainless/Aluminum Slip-On

    Yoshimura RS-4 Stainless/Aluminum Slip-On

    Robert in TN

    Looks great and sounds even better!!!

    This pipe is amazing for lack of a better word and RM has the best price period. This pipe looks great, sounds great, and even performs great. The finish is absolutely beautiful and the carbon fiber adds a nice touch. The 2009 crf450r suffers from lack of top end and this pipe definitely helps. I'll dare say its the best mod for the money on this bike!

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  • FMF Power Bomb Header Pipe

    FMF Power Bomb Header Pipe

    Parker in Wisconsin

    A must have!

    Bolted right on to my Rs-2 Slip on exhaust without any issues! Very easy to install and un install compared to the stock system. 100 times better than stock in all areas. It doesn't have a heat gaurd but you really shouldnt be wearing shorts while riding this kind of atv.

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  • Yoshimura RS-2 Stainless/Aluminum Slip-On

    Yoshimura RS-2 Stainless/Aluminum Slip-On

    Lanette in MO

    Yoshimura slip on

    Easy install, fits great and sounds even better! I'm very picky about buying exhaust and I don't regret buying Yoshimura!

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