So, you've decided to upgrade your ride with an aftermarket exhaust? That's awesome, but let’s talk about something that often gets overlooked: tuning. If you want to really unleash the potential of your new exhaust, you need the right fuel controller. Enter the Big Gun Power Box. This little gem is a plug-and-play solution that makes tuning your fuel-injected motorcycle, ATV, or Side x Side a breeze—seriously, you can have it set up in minutes.
What’s great about the Power Box is that it’s designed to tackle the lean issues that can pop up when you swap out for a higher-flow exhaust. It comes pre-programmed with a solid middle-of-the-road setting, so you don’t have to be a tuning wizard to get it right. Just plug it in, and you’re ready to hit the trails with improved throttle response and horsepower. You’ll definitely feel the difference when you twist the throttle!
Here are some of the standout features:
Just a heads-up: this product isn’t ARB/CARB compliant, so if you’re in California, you won’t be able to use it. Always good to check those local regulations!
As for fitment, if you’re rocking a Honda Moto TRX420FA1 Rancher 4x4 AT DCT 2014 or the Honda Moto TRX420FA2 Rancher 4x4 AT DCT 2014, this Power Box is a perfect match for you. Get ready to enjoy the ride like never before!
Other Part Numbers:
Big Gun Exhaust #624705
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2014 Honda Moto TRX420FA1 Rancher 4x4 AT DCT |
TRX420FA1 Rancher 4x4 AT DCT | 2014 |
|
2014 Honda Moto TRX420FA2 Rancher 4x4 AT DCT |
TRX420FA2 Rancher 4x4 AT DCT | 2014 |

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.