The Perfect Yoshimura - Rs-12 Stainless Slip-on Muffler - 2025+ Suzuki Dr-z4s & Dr-z4sm In Multiple Colors [RmbqZ4NY]

RS-12 Stainless Slip-On, w/ Stainless Muffler for the 2025+ Suzuki DR-Z4S and DR-Z4SM

The Yoshimura RS-12 Enduro Series Slip-On is a proven performance upgrade for the all-new 2025 Suzuki DR-Z4S. Designed and manufactured in Chino, California, this slip-on delivers measurable gains without sacrificing trail legality. With a 4.1% increase in horsepower at 8,000 RPM and a 2% torque boost at 4,800 RPM, it’s a solid step up from stock.

The RS-12 weighs in at just 9.2 lbs, cutting more than 4 lbs from the factory system. It includes a USFS-approved spark arrestor (SA-19-K) and a stainless Yoshimura heat shield, making it ready for off-road use straight out of the box.

Fitment:

• 2025+  Suzuki DR–Z4S & DR–Z4SM

This slip-on meets the requirements for 50-state off-road use while giving the DR-Z4S a deeper, more aggressive tone:

Sound levels with spark arrestor (J2825 standards):

• 2000 RPM: Stock – 74.4 dB / RS-12 – 86.0 dB

• 5000 RPM: Stock – 84.4 dB / RS-12 – 89.3 dB

If you’re not looking for a full race system but want a reliable performance bump with reduced weight and a more responsive feel, the RS-12 is the right call for your DR-Z4S.

Yoshimura part number:  116612S520