Yoshimura Street Exhaust RS-12 Stainless Muffler Suzuki DR-Z4 | 116612S520

After an impressive run of over two decades, 2025 brings an all-new Suzuki DR-Z4S/SM.

If a Race Series full system is not what you're looking for, we developed our RS-12 slip-on to pack performance on the DR-Z4S without compromising 50 state legality. The RS-12 Enduro Series slip-on provides great performance 4.1% in hp @8,000rpm and 2% increase of torque @4,800rpm with spark arrestor installed. This slip-on includes our installed USFS approved spark arrestor, SA-19-K, to make is easier to roll right out to your favorite off-road riding area. A custom stainless Yoshimura heat shield is included.

Yoshimura's RS-12 is proudly designed, developed and manufactured in Chino, California.

• Engineered for the demands of the off-road world.
• Aggressive, intelligently designed, asymmetrical shaped RS-12 profile allows maximized muffler volume to help manage sound, add performance, weight reduction and provides more clearance for tire and brake caliper.
• Works-look matte carbon fiber end cap and custom carbon fiber heal guard with industry leading design, innovation and detailing as expected from Yoshimura.
• New RS-12 end cap design improves durability, and eases servicing as compared to other sandwich mounting designs most commonly found in the industry.
• New patent pending Precision Taper Fit (PTF) insert ring makes it easy to install and remove sound inserts and spark arresters. Weight: Stock muffler: 13.4 Lbs. VS Yoshimura RS-12 ADV Slip-on: 8.7 Lbs.
• Proudly designed, developed and made in the USA!

Weights:

Stock slip-on: 13.6 lbs.

Yoshimura RS-12 slip-on: 9.2 lbs.

Sound levels:

(Using J2825 standards) with installed spark arrestor.

2000 rpm

Stock: 74.4 dB

RS-12: 86.0 dB

5000 rpm

Stock: 84.4 dB

RS-12: 89.3 dB