Alright, let’s talk about the Big Gun TFI Power Box. If you’ve got a Hisun Strike 800 from 2014 to 2016, this little gadget is a game changer. It’s not just about adding some horsepower; it’s about enhancing your whole riding experience. You’ll notice a snappier throttle response right off the bat, which is exactly what you want when you’re out there tearing up the trails.
Installation? Super straightforward. You can have it up and running in just a few minutes—no need to be a mechanic or have a degree in rocket science. The plug-and-play design means it fits right in without messing with the stock ECU map, so you don’t have to worry about any complicated computer adjustments. Plus, it’s got integrated faceplate buttons that let you tweak settings on the fly, making it easy to dial in your performance based on what you’re doing.
Now, if you’ve got an aftermarket exhaust on your EFI unit, this is highly recommended. It really complements those upgrades and helps you get the most out of your setup. Just a heads up, though: this product isn’t ARB/CARB compliant, so if you’re in California, you’ll need to look elsewhere.
And let’s not forget the peace of mind that comes with a 1-year limited warranty. You can ride knowing you’ve got some backup if anything goes sideways.
In short, if you’re looking to boost the performance of your Hisun Strike 800, the Big Gun TFI Power Box is definitely worth checking out. It’s all about making your ride more fun and responsive without a ton of hassle.
⚠ 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.