If you’ve ever swapped out your stock exhaust for something with a bit more growl, you know that tuning is key to getting the most out of your ride. That’s where the Big Gun Power Box comes into play. This little gem is a plug-and-play fuel controller that makes tuning your fuel-injected motorcycle, ATV, or Side x Side a breeze—seriously, you can get it done in just a few minutes.
What I love about the Power Box is how it really helps you unlock the full potential of your aftermarket exhaust. It addresses that annoying lean condition you often run into with high-flow systems, and it’s pre-programmed with a solid middle-of-the-road setting. So, you can install it and hit the trails without the hassle of fine-tuning right off the bat.
Let’s talk features. First off, it boosts your horsepower and improves throttle response, which is a game changer when you’re trying to get up those steep hills or just want a little more oomph on the open road. The third-generation technology means you’re getting something that’s been refined over the years, and you don’t even need a computer to adjust the EFI. Just plug it in, and you’re good to go. Plus, it doesn’t mess with your stock ECU map, so you can keep everything running smoothly.
One thing I really appreciate is the integrated faceplate buttons for easy adjustments. If you ever feel like tweaking things a bit on the fly, it’s super user-friendly. And let’s be real, if you’ve got an EFI unit with an aftermarket exhaust, this thing is highly recommended. Oh, and it comes with a one-year limited warranty, which is always nice for peace of mind.
Just a heads up, though—this product isn’t ARB/CARB compliant, so if you’re in California, you’ll have to look elsewhere. But for those of us who just want to enhance our ride, the 40-R52F Big Gun TFI Power Box for Honda Pioneer 700 (2015-2018) is a solid choice. Get ready to enjoy a whole new level of performance!
Other Part Numbers:
Big Gun Exhaust #621691
⚠ 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.