The Yoshimura RS-4 Exhaust System

RS-4 Comp Exhaust

Yoshimura Press Release

The race-proven Yoshimura RS-4 exhaust system is the most advanced performance off-road exhaust Yoshimura has to offer, and that system is now available for 2010-11 Suzuki RM-Z250s.

The addition of an Yoshimura RS-4 exhaust system will give your Suzuki a great boost in power that you’ll feel from right off idle all the way to redline.

The Yoshimura RS-4 features a unique duplex chamber design that delivers optimal noise reduction without impeding the flow of exhaust gasses.

This means you’ll get more power without the excessive noise commonly associated with high performance exhaust systems.

Noise levels can be further tuned through the use of the Yoshimura RS-4’s interchangeable volume inserts, from the USFS approved insert to the AMA Pro Racing legal insert.

RS-4 exhausts also feature legendary Yoshimura build quality from high-grade materials that can take whatever you might throw at it and keep performing.

The RS-4 Slip-on is constructed from stainless steel and aluminum for strength and lightness, while the RS-4 Full System features stainless/aluminum, titanium/titanium or titanium/carbon finishes for that factory look. Each Yoshimura RS-4 system also includes high-quality hardware and instructions for an easy installation.

Each of these exhausts can also be paired with a Yoshimura PIM-2 unit and DATA box accessory for even more power. The PIM-2 unit remaps your Suzuki’s fuel-injection system with one of the two included maps (designed for use with a Yoshimura Slip-on or Full System), or one of the additional maps available for download from the Yoshimura website. The PIM-2 installs in minutes, and comes with a mounting bracket and hardware.

For those looking to extract the best possible performance from their machine, the DATA box accessory can be combined with the PIM-2 unit to create custom fuel maps to match the user’s requirements. The DATA box accessory will help you get the most out of your Suzuki without the need for an expensive dyno tune. Like the PIM-2, the DATA box includes a mounting bracket and mounting hardware.

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 the wide variety of performance products, visit

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