Arrow Thunder Carbon Slip-On Silencer Yamaha YZF-R3 (2021-2026) 71831MK

When every tenth of a second matters on the circuit, the Arrow Thunder Carbon slip-on for the Yamaha YZF-R3 delivers genuine race-bred performance in a package that weighs just 1.63 kg. Built around a full carbon canister and carbon end cap, this silencer strips excess weight from the tail of your R3 while sharpening throttle response — exactly the edge that separates podium finishes from the midfield on track days and club racing alike.

Key Features

• Full carbon construction for the canister and end cap — dramatically lighter than stock, with high heat resistance that suits hard back-to-back sessions on track.
• Stainless steel internals ensure consistent flow and long-term durability through repeated heat cycles and sustained high-rev use.
• Weight of just 1.63 kg contributes directly to improved throttle response and sharper, more dynamic handling.
• Road-legal E-number homologation means the same silencer transitions seamlessly from race circuit to public road.
• Integrated db-killer included for street compliance without compromising the exhaust note when removed on track.
• Dedicated Arrow mapping available to fully optimise fuelling and throttle response for the YZF-R3 with this silencer fitted.

Carbon Performance on the Road and Track

Arrow's Thunder Carbon line represents the marque's commitment to race-derived engineering at a price accessible to the serious club racer and enthusiastic road rider. The 250 mm canister length has been developed to balance back-pressure and flow for the YZF-R3's parallel-twin engine character, producing a crisp, responsive power delivery throughout the rev range. The all-carbon outer shell is not merely cosmetic — it is the same material philosophy applied in Arrow's WorldSBK and MotoGP programmes, tolerating extreme temperatures while saving measurable rotational and unsprung mass.

Street Credentials

Despite its track orientation, the Thunder Carbon carries full E-number type approval for road registration across Europe. The supplied db-killer slots cleanly into the outlet and brings the system within legal noise limits for everyday riding, commuting, or scrutineering at noise-sensitive circuits. Remove it for open pit-lane sessions and the Arrow character comes fully alive.

Fitment and Compatibility

This silencer is a direct bolt-on replacement engineered specifically for the Yamaha YZF-R3 produced from 2021 to 2026. The 45 mm inlet diameter matches the stock mid-pipe connection precisely, requiring no modification or additional adapters. Arrow recommend pairing the installation with the dedicated mapping to fully realise the performance gain and eliminate any flat spots introduced by the freer-flowing exhaust.

Specifications

• Part number: 71831MK
• Type: Slip-on silencer
• Weight: 1.63 kg
• Canister length: 250 mm
• Inlet diameter: 45 mm
• Outlet diameter: 45 mm
• Canister material: Carbon
• End cap material: Carbon
• Internal components: Stainless steel
• Road legal: Yes — E-number homologated
• DB-killer: Included
• Fitment: Yamaha YZF-R3 (2021–2026)