If you're looking to give your off-road bike a serious boost, the EVO R series is where it's at. This exhaust system is not just about looks; it's built on years of experience in making power. Whether you're riding a Suzuki DR-Z 400S from 2000 to 2015 or a Kawasaki KLX 400R from 2003 to 2007, this setup is designed to drop some weight and crank up the performance.
First off, let’s talk about the sound. The EVO R gives you a growl that stock just can’t touch. You’ll definitely turn heads when you roll by. And for those who care about numbers, this system is lighter than the factory exhaust, which means less weight and more agility on the trails. Plus, you’re looking at some serious horsepower and torque gains—think of it as a little extra kick when you need it most.
Now, about the build quality. This isn’t some cheap knock-off. The hard anodized oval-shaped aluminum muffler is not only tough but also designed for maximum clearance. You won't have to worry about it getting in the way when you're tackling those rough terrains. The 304 stainless steel mid and head pipes are TIG welded for strength, and the red powder-coated end tip adds a nice touch of flair.
Oh, and if you're into safety, it comes with a removable screen-type spark arrestor, which is a nice feature for those who want to ride responsibly. Plus, it’s all handmade right here in the USA, so you know it’s built to last. And just to give you peace of mind, there’s a 1 Year Limited Manufacturer's Warranty backing it up.
Fitment:
So, if you’re ready to upgrade your ride without breaking the bank, the EVO R series is a solid choice. Just remember, this system isn’t ARB/CARB compliant, so if you’re in California, you might want to look elsewhere.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2003-2005 Kawasaki KLX400R |
KLX400R | 2003-2005 |
|
2000-2015 Suzuki DR-Z400S |
DR-Z400S | 2000-2015 |

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.