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4-Stroke Exhaust4-Stroke Exhaust

4-Stroke Dirt Bike Exhaust

It’s no secret that a properly selected aftermarket exhaust system can do wonders for your dirt bike. There isn’t an easier or faster way to add horsepower throughout your bike’s RPM range. When you want a new dirt bike exhaust system, Rocky Mountain ATV/MC is the best source around. We carry an extensive selection of dirt bike exhausts. Do you love FMF exhausts? So do we. Are you looking for a Yosh exhaust system? We’ve got several. How about a ProCircuit T-4 silencer? We carry it. Do you want a Moto Works exhaust? You’re in the right place. Interested in a Lexx MXe slip-on? Get it here at Rocky Mountain ATV/MC. If you own a 4-stroke dirt bike, a new exhaust system is a must have.

Whether you need a new exhaust system to boost your motocross racing performance or just a good silencer with a USFS-approved spark arrestor for enduro use, Rocky Mountain ATV/MC is the best place to find dirt bike exhaust pipes. We carry all of the leading brands: FMF, Yoshimura, Lexx, Pro Circuit, Motoworks and more. Exhausts are available in a variety of materials as well: titanium, stainless steel, aluminum and even carbon fiber. When you need a 4-stroke exhaust for your motorcycle, you can’t go wrong with these excellent exhaust systems. Whether you’re into motocross or just love a good trail, your dirt bike will really rip with these exhaust systems!

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

  • FMF Power Core IV S/A Silencer

    FMF Power Core IV S/A Silencer

    Mike in Arkansas

    Stop debating buying the Power Core 4- JUST DO IT!

    I spent a good week reviewing website reviews, watching You Tube videos, talking to dealers, etc. There are several options and manufacturers dealing with after market exhaust. The FMF Power Core 4 is absolutely AWESOME. The videos do not do justice to the sound this thing puts out! It went from sounding like a kitten to an angry lion in about 20 minutes of EASY installation. However, don't expect this to totally give you balls to the wall power. It did increase the performance somewhat and I am very pleased. The immediate change was just the awesome sound and rumble this thing puts out. My TTR is now as loud, or louder, than my brother's YZ! Highly recommended!

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  • 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 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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