If you’re in the market for a CDI box upgrade, let me tell you, the Big Gun Over Rev Box is a solid choice without breaking the bank. I’ve swapped out my stock CDI with this one, and the difference is noticeable. It cranks up the RPM limit beyond what the OEM box offers, which is a game changer when you’re looking to get a bit more out of your ride.
One of the standout features is the advanced timing curve. It’s not just about revs; it’s about how those revs translate into power. You’ll feel the engine respond quicker, and it really makes a difference when you’re out on the trails or just cruising around. Plus, installation is a breeze—just plug it in, and you’re good to go. No complicated wiring or fancy tools needed.
And let’s not forget about the peace of mind that comes with a 6-month limited warranty. It’s nice to know that if something goes sideways, you’re covered. This box fits perfectly on the Honda TRX 90 models from 2002 to 2005, so if that’s your ride, you’re in luck.
Overall, if you want to give your Honda TRX 90 a little extra kick without spending a fortune, the Big Gun Over Rev Box is definitely worth considering. It’s reliable, easy to install, and it just works.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2002-2005 Honda Moto TRX90 Sportrax |
TRX90 Sportrax | 2002-2005 |

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.