Arrow GP2 Slip-On Silencer Titanium – BMW S1000RR K67 (2019-2026) 71554GP

Constructed from aerospace-grade titanium with a matching titanium end cap and stainless steel internals, the Arrow GP2 71554GP is one of the most material-conscious slip-on silencers available for the BMW S1000RR K67. At just 1.52 kg, the weight saving over the factory unit is immediately felt in the handling, while the road-legal E-number homologation means you can run it daily without compromise.

Key Features

• Full titanium silencer body and end cap — exceptional heat resistance, corrosion immunity and a raw, purposeful finish that ages beautifully
• Stainless steel internal components for long-term durability and consistent flow characteristics
• Weighs only 1.52 kg, delivering a meaningful reduction in unsprung and overall mass for sharper handling and acceleration
• Road-legal E-number approval — compliant for unrestricted use on public roads without modification
• Removable dB killer included — retain road legality day-to-day, extract it for the full GP2 note on track
• Plug-and-play fitment designed specifically for the S1000RR K67 chassis — no cutting or fabrication required
• Compatible with Arrow headers to build a complete Arrow exhaust system, unlocking the full performance and throttle-response potential of the platform

Build Quality and Materials

Arrow's GP2 lineage draws directly from their grand prix programme, and the material specification of the 71554GP reflects that heritage. The titanium canister is precision-formed to tight tolerances, giving a seamless, weld-line aesthetic that stands apart from cheaper steel or aluminium alternatives. Titanium's natural ability to dissipate heat rapidly also protects surrounding bodywork during sustained high-rpm use — a genuine practical advantage on a machine as thermally aggressive as the S1000RR.

Inside, the stainless steel packing chamber and baffle assembly are engineered to survive repeated heat-cycling without degradation. This is not a silencer that will rattle or discolour prematurely; the internal architecture is built to the same standard as the outer shell.

Performance and Sound

The GP2 canister is dimensioned to work in harmony with the S1000RR K67's engine mapping and exhaust gas velocity. The 60 mm inlet and 58 mm outlet diameters are optimised for the engine's mid-to-high rpm power band, encouraging freer breathing without sacrificing low-end torque. For riders seeking the maximum return, pairing the 71554GP with an Arrow header to form a complete system — combined with a dedicated ECU remap — is strongly recommended to fully realise the gains in power delivery and throttle response.

Road and Track Use

The factory-fitted dB killer keeps the GP2 within road-legal sound limits for everyday riding. When the circuit calls for the unfiltered Arrow tone, the dB killer can be removed in minutes without tools, transforming the exhaust note to match the character of the machine. This dual-mode capability makes the 71554GP an ideal single investment for riders who use their S1000RR in both environments.

Fitment and Compatibility

Designed and manufactured exclusively for the BMW S1000RR K67, covering model years 2019 through to 2026. Fits directly onto the OEM header pipe as a drop-in replacement slip-on. Also compatible with Arrow's own header pipes for a full Arrow exhaust system build. No additional brackets or adapters are required for standard fitment.

Specifications

• Brand: Arrow
• Part number: 71554GP
• Type: Slip-on silencer
• Fitment: BMW S1000RR K67 (2019-2026)
• Silencer material: Titanium
• End cap material: Titanium
• Internal components: Stainless steel
• Weight: 1.52 kg
• Total length: 200 mm
• Inlet diameter: 60 mm
• Outlet diameter: 58 mm
• Road approval: E-number homologated
• dB killer: Included, removable