Arrow Race-Tech Aluminium Dark Slip-On Silencer BMW S1000RR K67 (2019-2026) 71903AKN

The Arrow 71903AKN Race-Tech slip-on silencer makes upgrading your BMW S1000RR K67 genuinely straightforward — E-marked for full road legality, plug-and-play fitment, and a 2.93 kg weight that delivers a real reduction over the stock unit without any track-day compromise. Whether your S1000RR is your daily ride or weekend weapon, this silencer earns its place on both.

Key Features

• E-marked type approval — road-legal straight out of the box across the EU, no paperwork headaches.
• Weighs just 2.93 kg, trimming unsprung and overall mass for sharper throttle response and improved handling balance.
• Dark anodised aluminium canister with a carbon end-cap: a purposeful finish that ages well and resists heat discolouration.
• Stainless steel internals resist corrosion and maintain flow efficiency over years of use.
• Removable dB killer included — run it quiet for commuting or remove it for a freer exhaust note at track days.
• Fully compatible with Arrow headers to build a complete Arrow exhaust system and unlock further performance gains.
• Plug-and-play installation — bolts directly to the stock header on the BMW S1000RR K67 with no fabrication required.

Build Quality and Design

Arrow has constructed the Race-Tech canister from dark anodised aluminium, a material chosen for its combination of low mass, structural rigidity, and ability to handle sustained heat cycles without warping or fading. The carbon fibre end-cap adds a premium visual accent and contributes to the overall heat management at the silencer exit. Inside, stainless steel baffling ensures the gas flow path remains clean and corrosion-free regardless of climate or riding conditions.

The 300 mm canister length and a 60 mm inlet matched to a 50 mm outlet have been sized specifically for the S1000RR K67's exhaust characteristics, preserving mid-range torque while opening up top-end breathing. A custom Arrow map is recommended to extract the full potential of the improved flow, though the silencer runs cleanly on the OEM ECU map from day one.

Road and Track Use

The removable dB killer is the detail that makes this silencer genuinely versatile. Fitted, the silencer meets road noise regulations and passes static noise tests at most circuits. Removed, it frees up exhaust flow further and delivers the sharper, more characterful note Arrow is known for. Swapping the dB killer in or out takes minutes, so a single silencer covers your morning commute and your track afternoon without compromise.

Should you decide to go further, the 71903AKN pairs directly with Arrow's purpose-matched header for the S1000RR K67, creating a full Arrow exhaust system that delivers measurable gains in power delivery and throttle response across the rev range.

Fitment and Compatibility

This silencer is designed and certified exclusively for the following motorcycle:

• BMW S1000RR K67 — model years 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026

Compatible with Arrow headers for the same model to form a complete exhaust system. Not suitable for earlier S1000RR generations. Please note: the product image is a photoshop representation as Arrow has not yet released an official photograph for this part number; the specifications and fitment data are confirmed.

Specifications