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4-Stroke Exhaust4-Stroke Exhaust

4-Stroke Exhaust from Rocky Mountain ATV/MC

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 muffler 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 mufflers and silencers. 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 Q4 S/A Silencer

    FMF Q4 S/A Silencer

    Cory in NV

    Good but a tight fit.

    First of all, I paired this up with the FMF Power Bomb exhaust header pipe. This system gets rid of the factory clamp for my bike, so it is a "direct fit" that holds it into place. I had troubles getting the two pipes to seed together perfectly. After about 45 minutes of mounting and un-mounting the pipes and spraying wd-40 at the contact points they finally slipped on and mounted up. Also, the muffler did contact my rear fender so I had to cut some of that away. Also, the FMF customer service line was extremely helpful. All in all it sounds mean, not necessarily louder, just meaner. I am satisfied with this product and Rocky Mountain delivered on time, with the cheapest price ($70) cheaper than anywhere else.

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

    FMF Factory-4.1 RCT Anodized System With Titanium End Cap

    Tim in CA

    Open up the power

    This FMF pipe is a lot lighter than the stock pipe and it lets the Husky breathe better for crisper response. Easy to install, fits great and looks great too!

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  • FMF Power Bomb Header Pipe - Moto

    FMF Power Bomb Header Pipe - Moto

    James in NY

    Great fit nice power

    Used this with a stock muffler, fits perfect, not too loud and adds nice power.

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  • Lexx MXe Slip-On Silencer With Mid-Pipe

    Lexx MXe Slip-On Silencer With Mid-Pipe

    edward in CA

    Sweet Music

    Great tone. Not too loud. Looks way cool. I have used the other popular brands in the past on other bikes. Lexx Rocks. I will tell all my riding buddies, save your cash. GO LEXX !!

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  • FMF Titanium Megabomb Header Pipe

    FMF Titanium Megabomb Header Pipe

    Mykel in Illinois

    The power gain is real!

    Let me just start off by saying that I immediately noticed the power gains with this header. I paired this with my FMF PowerCore4 slip on exhaust, and I left black marks across the entrance of my dad's shop when slowly taking off. I now have to flip my tire around because the sharp edges on my knobs are gone, and with this exhaust, my tire spins a bunch. The only thing that you need to watch out for is keeping your pants off the "Bomb" part when riding. It turns blue and looks cool and stuff, but will melt your pants no problem. Just happened to me over the weekend.

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  • Yoshimura RS-2 Stainless/Aluminum Slip-On

    Yoshimura RS-2 Stainless/Aluminum Slip-On

    Steven in NM

    what I wished my raptor sounded liked when new

    Glad I finally bought an exhaust for my raptor and very pleased that it was this one. Sound is great and it slipped on with out difficulty. This is what I wish my raptor sounded like when I first bought her back in 08. I only have a k&n intake and this exhaust for now and everything is running fine. During my first ride in the dunes definitely felt as if everyone could hear me out there.. Haha

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