Arrow Pro-Race Slip-On Silencer Stainless Steel – Yamaha YZF-R3 (2021-2026) 71831PRI

Road-legal and track-ready in equal measure, the Arrow Pro-Race 71831PRI is a homologated stainless steel slip-on silencer purpose-built for the Yamaha YZF-R3 (2021–2026). Carrying a full E-number type approval, it lets you ride to the track, remove the DB killer for a freer exhaust note on circuit, then ride home without touching a spanner — genuine dual-use performance from a manufacturer whose exhausts appear on World Superbike grids.

Key Features

• E-number street homologation: fully road-legal straight from the box, no paperwork headaches or re-registration required.
• Included DB killer brings the silencer into legal sound limits for road use; remove it on track for an unrestricted exhaust note.
• All-stainless steel construction throughout — canister body, end cap, and internal components — resists corrosion and withstands sustained high exhaust temperatures.
• At just 1.12 kg the Pro-Race saves meaningful unsprung and chassis mass compared to the OEM unit, sharpening throttle response and improving weight distribution.
• 250 mm canister length with a 45 mm inlet and 68 mm outlet diameter is optimised for the YZF-R3's engine character, promoting free-revving mid-range delivery.
• Arrow recommends pairing this silencer with a dedicated ECU map developed specifically for the 71831PRI to unlock the full performance benefit on the YZF-R3.

Homologation and Road Compliance

The E-number approval is the headline specification here. Unlike many aftermarket systems that exist in a legal grey area, the Arrow Pro-Race 71831PRI has passed the European type-approval process for road use on the Yamaha YZF-R3. Ride it daily, use it for a track day weekend, and return to public roads with confidence. The supplied DB killer handles noise compliance without compromising the silencer's core flow characteristics — it slots in and out cleanly when conditions change.

Build Quality and Materials

Every component in the 71831PRI — from the internal baffling and perforated liner to the end cap and outer shell — is fabricated from stainless steel. This matters in daily use: road grime, rain, and road salt that would quickly pit lesser alloys are shrugged off by the stainless finish. The result is a silencer that looks as purposeful after three winters of commuting as it did when first fitted. The sporting aesthetic is uncompromised: the stainless finish suits the YZF-R3's angular bodywork and reads as genuinely premium rather than budget aftermarket.

Performance on Road and Track

The Pro-Race series sits at the sharper end of Arrow's catalogue — the name reflects its origins in circuit-derived development. The combination of a free-flowing 45 mm inlet, a 68 mm outlet, and a 250 mm body encourages the YZF-R3's parallel-twin to breathe more freely across the rev range, with the most noticeable gains in throttle response and upper mid-range pull. For riders who also use the bike on track, removing the DB killer sharpens the exhaust note and marginally reduces back-pressure, complementing an Arrow-specific ECU map for the best possible calibration.

Fitment and Compatibility

This silencer is a direct, bolt-on replacement for the standard exhaust on the following model:

• Yamaha YZF-R3 — model years 2021, 2022, 2023, 2024, 2025, 2026

Part number: 71831PRI. Always verify the part number against your specific model year before ordering. Arrow recommends fitting a compatible ECU mapping solution alongside this silencer for optimum fuelling calibration.

Specifications