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

  • FMF Power Bomb Header Pipe

    FMF Power Bomb Header Pipe

    Michael in AZ

    Awesome!

    I've bought many of these and never been disappointed! Bolts right in and the fact they include new washers is a definite plus!!

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  • Lexx MXe Slip-On Silencer With Mid-Pipe

    Lexx MXe Slip-On Silencer With Mid-Pipe

    Jamie in Iowa

    Good not Great

    Good exhaust for the price and nice to have another exhaust option on the market. Not the best sounding out there but does add a little noise with the quiet core removed, as well as a little low end power on my yz450f. Does have some rubbing issues on the tire and is very long which makes the bike look a little dated over the factory "shorty" silencer. Good for the money but if I could do it over I would probably save a little longer and go for an FMF.

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  • HMF Racing Replacement USFS Spark Arrestor Screen

    HMF Racing Replacement USFS Spark Arrestor Screen

    Richard in PA

    Works great

    Fits right into place. Easy install. Just three bolts and tail cap comes off.

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  • FMF Power Core 4 Hex S/A Silencer

    FMF Power Core 4 Hex S/A Silencer

    Keith in CO

    Great exhaust!

    This sounds great on my WR250F - the right amount of bark without being obnoxious. Fit is perfect and it looks awesome. It also compliments the competition ECU kits very well. Bike runs perfect.

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  • FMF Power Core IV S/A Silencer

    FMF Power Core IV S/A Silencer

    Lee in OR

    Great sound and performance

    This replaced the stock that was the stock can on my old XR650L it woke the bike up a little and it also made it sound great.

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  • FMF Q4 S/A Silencer

    FMF Q4 S/A Silencer

    Trevor in TX

    Great Tone

    Bought it for a 2006 dual pipe crf250r. Very quiet bike for a 250. The fmf pipe came with detailed instructions as well as all the parts needed and a few stickers. Because it went on a relatively quiet bike the pipe didn't quiet it down a whole bunch but the tone is great. A bit more low end, great pipe if you want a good sound and a little power without making it super loud like a powercore.

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