Choose a vehicle:

User Tip: If you're unsure of your vehicle type, you may skip the machine type selection box.

» Log in to use your Rider Profile Machines

Please select make, model and year

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

    Thomas in AB

    Easy install

    Nice sound and easy to install.

    Read All Reviews
  • FMF Power Core IV Exhaust System

    FMF Power Core IV Exhaust System

    JOE in NY

    Great all around pipe

    Good for all types of riding, looks great

    Read All Reviews
  • FMF Power Bomb Header Pipe - Moto

    FMF Power Bomb Header Pipe - Moto

    Sandra in MA

    Awesome

    I just put the fmf power bomb header on along with fmf's power core 4 silencer and I am amazed with the the difference in power! Very very snappy throttle response and great low to mid range power and even in the top end it is great! Can hardly keep the front tires on the ground!! It sounds absolutely awesome too.

    Read All Reviews
  • FMF Power Core IV S/A Silencer

    FMF Power Core IV S/A Silencer

    Sandra in MA

    Awesome

    I just put the fmf power core 4 on along with the fmf power bomb header and I am amazed with the the difference in power! Very very snappy throttle response and great low to mid range power and even in the top end it is great! Can hardly keep the front tires on the ground!!

    Read All Reviews
  • Pro Circuit T-4 S/A Complete Exhaust System

    Pro Circuit T-4 S/A Complete Exhaust System

    Paul in AZ

    Great Product to install on your bike.

    Bought this for my wife's bike and it woke it up. Noticed better power throughout the range. It allowed her to pull the hills better. I was impressed with the noise level. Sounds great without making is loud. Would buy again anytime. Well worth the money for a mod to increase power.

    Read All Reviews
  • Lexx MXe Slip-On Silencer With Mid-Pipe

    Lexx MXe Slip-On Silencer With Mid-Pipe

    Tony in CA

    Good product for the money

    The quiet core cracked after a couple of rides, but it was replaced immediately with a new one that seems to be better quality. No issues with new core. I wish they would make a carbon fiber end cone for this pipe. Fits well, looks good, and provided a noticeable improvement in performance.

    Read All Reviews
Frequent Buyer ProgramParts Finder