If you're looking to give your Yamaha YFZ 450X a serious upgrade, the EVO R series exhaust is where it’s at. This isn't just another exhaust system; it’s a well-crafted piece of engineering that takes your ride to a whole new level. Built for those who love to push their machines, this full system has been designed with performance in mind, and you can really feel the difference.
The heart of this setup is the hard anodized oval-shaped aluminum muffler. It’s not just for looks—this design helps save weight compared to the stock exhaust, which means you get more power and better handling. The TIG welded reinforced muffler brackets ensure that everything stays solid during those rough rides.
One of the standout features is the 304 stainless steel mid-pipe and head pipe. This material is tough and resistant to corrosion, so you know it’s going to last. Plus, the red powder-coated stainless steel end tip adds a touch of flair while also being durable. You’ll definitely turn some heads!
Now, let’s talk performance. We’re talking huge horsepower and torque gains that you can actually feel when you twist the throttle. The sleek design of the muffler also means you’ll have maximum clearance, so you won’t have to worry about it getting snagged on the trails. And if you’re concerned about spark issues, it comes with a removable screen-type spark arrestor, which is a nice touch for off-road riding.
Every EVO R exhaust is handmade right here in the USA, which speaks to the quality and attention to detail that goes into each unit. Plus, you get peace of mind with a 1-year limited manufacturer’s warranty, just in case you run into any issues.
In short, if you're ready to ditch that stock exhaust and make your YFZ 450X roar, the EVO R Full System is the way to go. It’s built for those who take their riding seriously, and it shows in every detail.
Other Part Numbers:
Big Gun Exhaust #623665
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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.