Arrow Indy Race Aluminium Slip-On Silencer Aprilia RS 660 2020-2024 71929AK

The Arrow 71929AK Indy Race slip-on silencer gives your Aprilia RS 660 a genuine upgrade without demanding a full system commitment. Street-legal straight from the box thanks to its E-number homologation and Euro 5 compliance, it pairs a lightweight aluminium canister with a carbon end cap and stainless steel internals — an everyday exhaust that earns its keep whether you're commuting or carving back roads.

Key Features

• E-number approved and Euro 5 compliant — fully road-legal, no modifications required
• Aluminium canister weighing just 2.23 kg for a noticeable reduction in unsprung mass
• Carbon end cap adds heat resistance and a premium, race-influenced aesthetic
• Stainless steel internals resist corrosion and maintain structural rigidity over the long term
• Includes a removable dB killer for compliant street use or louder track days
• Direct plug-and-play fitment onto the Arrow header 71755 — no cutting or fabrication

Performance & Build Quality

Arrow's Indy Race series occupies a practical sweet spot: genuine performance hardware built to a price that makes sense for regular riding. The 270 mm aluminium body keeps the overall package compact and tucked tightly to the tail of the RS 660, preserving ground clearance and lean angle. Internal flow geometry has been shaped to liberate the parallel-twin's mid-range punch, and with a dedicated ECU remap the throttle response sharpens noticeably. The carbon fibre end cap is not merely decorative — it handles heat cycling better than painted aluminium and stays looking sharp after sustained motorway runs.

Road & Track Versatility

The included dB killer makes this silencer genuinely practical for daily use in noise-sensitive areas, and it pulls out cleanly for circuit sessions where you want the full exhaust note. Because the unit carries full E-number approval you can leave it fitted year-round without worrying about roadworthiness checks. Pairing the 71929AK with the Arrow header 71755 transforms the installation into a complete exhaust system that further sharpens throttle response and peak power — an upgrade you can grow into at your own pace.

Fitment & Compatibility

This slip-on silencer fits the Aprilia RS 660 for model years 2020, 2021, 2022, 2023 and 2024. It is designed exclusively for use with the Arrow header 71755; it is not compatible with the original Aprilia header or third-party mid-pipes. A custom ECU mapping is recommended to make the most of the freer-flowing exhaust.

Specifications

• Part number: 71929AK
• Canister material: aluminium
• End cap material: carbon fibre
• Internal components: stainless steel
• Weight: 2.23 kg
• Overall silencer length: 270 mm
• Inlet diameter: 54 mm
• Outlet diameter: 58 mm
• Homologation: E-number, Euro 5 compliant
• dB killer: included, removable