Yoshimura RS-4 Dual Full Exhaust for Suzuki DR-Z400S/SM (2000–2024) | Stainless System with Aluminium Mufflers

The Yoshimura RS-4 Dual Full Exhaust (YO-116600D320) is the preferred upgrade for DR-Z400S and DR-Z400SM riders who want stronger performance, cleaner power delivery, and a durable system that holds up in Australian conditions. The system uses a high-flow stainless steel header and mid-pipe matched with dual aluminium mufflers and carbon fibre end caps. This design improves exhaust scavenging, lowers operating temperature, and offers noticeable gains in torque across the mid-range.

Dyno testing shows typical increases of 4–6 percent horsepower and 8–12 percent torque, with quicker throttle response. The RS-4 design uses a polyresonant chamber and two-stage baffle to reduce harshness while improving flow. Weight drops by roughly 1.0 kg compared to the stock Suzuki exhaust, helping handling on both road and dirt.

The construction suits Australian weather, with corrosion-resistant 304 stainless steel, heat-efficient aluminium canisters, and UV-stable carbon caps. Riders upgrading from stock notice three main differences: the RS-4 has faster acceleration in the mid-range, reduced heat near the rider’s leg, and a deeper tone typical of Yoshimura’s race-bred systems.

Fitment covers DR-Z400S 2000–2024 and DR-Z400SM 2005–2024 with direct install using stock mounting points. Most riders complete installation in 1–2 hours with basic tools. Professional shops in Australia usually charge AUD 150–300 for full install. The RS-4 is widely used in performance builds inspired by Yoshimura’s championship racing heritage and the “hot rod” DR-Z setups seen in the US and EU.

This model is sold as Indent Pre-Order Only with pricing at AUD 1,499.95 (regular price AUD 2,099.95). Ideal for riders wanting proven performance gains, premium materials, and long-term durability on both sealed roads and off-road trails.