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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 Dirt Bike 4-Stroke Exhaust Reviews – You could win up to $500 for reviewing products!

  • FMF Factory-4.1 RCT Anodized System With Carbon End Cap

    FMF Factory-4.1 RCT Anodized System With Carbon End Cap

    Jamie in OR

    Worth every penny!

    You just can't go wrong with FMF. This system made a HUGE improvement over stock on my 2014 yz450f. It added horsepower and smoothed out the power band while also saving a boat load of weight. Extremely well made and easy to install. FMF even provides a how-to install video on YouTube. It has to be the easiest modification you can make that produces the greatest improvements. Highly Recommended!

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  • Lexx MXe Slip-On Silencer With Mid-Pipe

    Lexx MXe Slip-On Silencer With Mid-Pipe

    RICHARD in WA

    Great Quality

    Bought this exhaust because the stock pipe was too loud with the baffle removed. It is within a half pound of the stock pipe weight (was expecting it to be lighter). It was easy to install and looks good. It is mounted solidly and I have several rides on it now and have not had any issues. It is now quieter than the stock pipe with the baffle removed. This pipe is a good value.

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  • Yoshimura RS-4 Stainless/Aluminum Full System

    Yoshimura RS-4 Stainless/Aluminum Full System

    Chris in FL

    Super Nice

    Yoshimura does things right. This thing bolted right up. The quality is unmatched. The sound is deep but not to loud. Comes with spark arrester. The fit and finish is beyond words. Thanks

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  • FMF Hex Q4 S/A Silencer

    FMF Hex Q4 S/A Silencer

    Zach in IN

    nice improvement

    A huge improvement over a stock WR exhaust. removeable spark arrestor is nice. The only downside is that the FMF decal on the back is a poor design. Both mine and my buddy's have already came off in about 6 months time.

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  • Polaris Stage 2 Upgrade Kit

    Polaris Stage 2 Upgrade Kit

    Derek in CO

    This Kit is worth the money!

    The exhaust on this kit is perfect. Increase exhaust flow and sounds throatier, its not annoying loud. If anything this is the upgrade to get. I am excited to see how the cams are going to do once installed. Amazing how much power this kit increases the RzR. I love it!

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  • FMF Power Core IV S/A Silencer

    FMF Power Core IV S/A Silencer

    Helmut in VIC

    After Race Map this is another Improvement ...

    cant beat the price and great performance .

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