Industry News


Arctic Cat Wildcat – RS-4 Exhaust

CHINO, CA (July 27, 2012) – Yoshimura R&D of America is proud to announce the availability of performance exhaust and hard parts for the popular Arctic Cat Wildcat Side-by-Side. In recent years, UTVs and Side-by-Sides have emerged as some of the most popular off-road vehicles. We were excited for the opportunity to put our knowledge, skill, and craftsmanship forth and develop performance products for these machines. In order to produce the most functional and durable products available, we had to find someone who could test and abuse them on a regular basis. No one fit the bill better than William Yokley of Yokley Racing. William is no stranger to riding or the podium. He began riding as a child, racing by age 15, and has since captured several ATV and UTV Championships, including the Baja 1000.
Yoshimura has been working intently with Yokley Racing to develop parts specific to racing, while also benefiting the weekend warrior. Because we take racing very seriously, we utilized the best technological equipment available. Through the use of high-tech data acquisition and GPS tracking technology, similar to those used in Formula One racing, we’ve developed the best performing products in the industry. With additional input from Yokley and his team, we’ve tuned intakes, exhausts, engines, engine management, and fuel – everything conceivable for the best performance possible. Yoshimura is proud to play a role in the development of UTV performance and racing.
The RS-4 full system and a number of hard part accessories are now available for the Arctic Cat Wildcat. The RS-4 is CNC mandrel bent using 304 stainless steel tubing for a long lasting, durable and rust-resistant life. Headers feature an over-sized step tube design for maximum power through out the entire RPM range. The two-into-two header design converges at the muffler inlet, providing ample exhaust flow. The RS-4 muffler features a 304 stainless steel CNC rolled and robot welded canister shell and staying true to the RS-4 off-road systems, this system uses a carbon fiber end-cap. The system not only looks better, but out performs the stock exhaust system and weights less too. The full system includes the RS-4 stainless steel muffler with a carbon fiber end-cap, stainless steel headers and tailpipe, installation hardware, and step-by-step instructions. Aluminum roof kits, roost guards and aluminum wind deflector kits are also available – all built to the highest standards by Yoshimura R&D in America.

Stainless RS-4 Slip-On with Carbon End Cap
Part Number: 391002D520
MSRP: $580.00
Stainless RS-4 Full System with Carbon End Cap
Part Number: 391000D520
MSRP: $799.00
Aluminum Roof Kit (For OEM Roll Cage)
Part Number: 907XX391000
MSRP: $399.00
Aluminum Wind Deflector Kit (For OEM Roll Cage)
Part Number: 906XX391000
MSRP: $125.00
Aluminum Roost Guard Kit
Part Number: 908BG391000
MSRP: $69.95

Please see for applications and updates.

These products are designed, manufactured, intended, and sold for use on vehicles that are operated only on closed course racing circuits unless otherwise noted. Use of these products on public roads or lands is strictly prohibited and may be a violation of local, state, or federal laws. Products intended for use on vehicles operated on public roads or lands are clearly so indicated.

About Yoshimura R&D of America: Yoshimura is “The Leader in Performance” and has been for more than 55 years. With unmatched skills, knowledge and passion for racing, Yoshimura is on the forefront of the aftermarket exhaust industry. Yoshimura pipes are race bred and feature the same legendary performance, fit and quality that has been their trademark for more than five decades. To learn more about Yoshimura and view their wide variety of performance products, visit

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