Yoshimura DR-Z4 S/Sm 25-26 Race RS-12 Stainless Full Exhaust, W/ Stainless Muffler

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

The new 398cc single cylinder water cooled engine is now fuel injected! We developed our RS-12 Race Series full system exhaust to enhance every aspect of the new DR-Z and the response was just what the doctor ordered. The RS-12 Race Series Full System packed substantial gains in performance adding 5.5% in hp @6,640rpm and 2.8% increase of torque @5,180rpm. These gains were made with our included/installed USFS spark arrestor SA-21-K! A custom stainless Yoshimura heat shield is included.

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

Weights:

Stock system: 17.8 lbs.
Yoshimura RS-12 full system: 10.6 lbs.

Sound levels: (Using J2825 standards) with installed spark arrestor.
2000 rpm
Stock: 74.4dB
RS-12: 90.4 dB

5000 rpm
Stock: 84.4 dB
RS-12: 93.4 dB

Sound Insert/Spark Arrester Options

Sound Level	Volume Insert	Spark Arrestor	Included
	INS-32-K		No
		SA-21-K	Yes
		SA-20-K	No
	INS-34-K		No