If you're looking to give your ride a serious boost, the EVO R series is where it’s at. Drawing from years of experience in the power game, this exhaust system is specifically crafted for off-road MX and sport ATV models. I've had my hands on this setup, and let me tell you, it’s a game changer. Not only does it shed some weight, but the performance gains are noticeable right out of the gate. Plus, the sound? It’s a whole new level compared to the stock setup.
The design is slick, featuring a hard anodized oval-shaped aluminum muffler that not only looks great but also fits perfectly under your machine, giving you maximum clearance. The TIG welded reinforced muffler brackets mean it’s built to last, even when you’re pushing your limits on tough trails. The mid pipe or head pipe is made from 304 stainless steel, so you know it’s durable and resistant to corrosion. And that red powder-coated stainless steel end tip? It’s not just for looks; it adds a nice touch of style to your ride.
One of the standout features is how much lighter it is than the stock exhaust. This means you’ll feel the difference in handling and acceleration. And let’s not forget about the horsepower and torque gains—huge improvements that you’ll appreciate whether you’re climbing hills or tearing down straightaways.
If you’re concerned about regulations, the EVO R comes with a removable screen-type USFS approved spark arrestor, so you can ride with peace of mind. And the cherry on top? It’s handmade right here in the USA, which is always a plus in my book. You also get a 1-year limited manufacturer's warranty, just in case you run into any issues.
For compatibility, this system fits the KTM 450 SX models from 2009 to 2013. So if you’re ready to upgrade your exhaust and experience a whole new level of performance, the Big Gun EVO R Full System Muffler is definitely worth checking out.
Other Part Numbers:
Big Gun Exhaust #622411
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2009-2010 KTM 450 SX |
450 SX | 2009-2010 |

Big Gun Exhaust was founded in 1997 by former professional motocross racer, Mike Young, Jr., a three-time winner of the AMA National Four-Stroke Championship. He knew what it took to win the races and used that knowledge to start a business of manufacturing high-performance, quality exhausts for the motocross and sport ATV market, and eventually the side-by-side and street markets as well.
New Ownership, New SuccessAfter more than a decade of success under Young, Big Gun Exhaust was sold to a new owner in the hopes of facilitating further growth. In 2010, the company changed ownership once more, which called for tremendous restructuring in an effort to improve the brand. The new management and sales team helped rebuild the Big Gun Exhaust brand and streamline production and manufacturing processes under one roof in Corona, California. The more efficient manufacturing process resulted in a new level of success never before seen with Big Gun. Today, Big Gun Exhaust boasts one of the largest four-stroke exhaust product lines available and caters to the MX, Sport ATV, Utility ATV, Side-by-Side, Street, and Scooter markets.
What Makes Big Gun Exhaust Special?All quality Big Gun Exhaust products are made right here in the USA using some of the latest cutting-edge equipment, and design and production techniques. Big Gun Exhaust takes pride in having one of the fastest lead times in the industry, which has allowed it to see exponential growth in the last few years.
Big Gun Exhaust has garnered a huge customer base all around the world thanks to its emphasis on customer service and satisfaction. Its partnerships with successful race teams and riders only further solidified the brand’s dedication to competing and winning. The company’s experienced team continues to work closely with racing teams, sponsoring different motorsports events and gathering valuable data to be used in improving its product lineup.
Big Gun Exhaust’s R&D department has been tirelessly working to stay ahead of the competition and develop new innovative systems that exceed customer expectations. The successful ECO, EVO, and EXO lines of four-stroke exhaust systems have been accompanied by the premier EXO stainless series which set the bar even higher for aftermarket performance exhausts in the growing ATV and side-by-side markets.
Upgrade to Big Gun Exhaust TodayBig Gun Exhaust is one of the leading ATV, Motocross, UTV, and Side-by-side exhaust manufacturer in the USA. If you are interested in upgrading to one of its systems, look no further. Vivid Racing has a wide selection of products from Big Gun Exhaust, including exhaust tips, fuel regulators, mufflers, headers, power boxes, packing kits, snorkel kits, and piggyback modules. If you cannot find a particular part above or have questions regarding Big Gun Exhaust, please call our specialized sales team at (480) 966-3040.