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. 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 This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and aftermarket accessories not found on a bike as delivered from the factory may not be compatible with this product. Attention international customers: This product was designed and tested to be compatible with vehicles in the U.S. marketplace only. Compatibility, including fitment and performance, may vary by marketplace.