SC-Project SC1-R Slip-On Silencer Aprilia RSV4 1100 Factory (2021-2024) Titanium A27A-91T

Developed in close collaboration with Aprilia Racing, the SC-Project SC1-R slip-on silencer for the Aprilia RSV4 1100 Factory (2021-2024) is built from the same uncompromising materials and manufacturing processes that supply the MotoGP paddock. A titanium canister, hydroformed carbon fibre end cap and TIG-welded construction deliver a measurable performance gain alongside a weight saving of 1 kg over the stock unit — all while retaining full Euro 5 road approval.

Key Features

• Titanium silencer body: exceptional strength-to-weight ratio with an unmistakable racing aesthetic straight out of the crate
• Hydroformed carbon fibre end cap: aerodynamically optimised profile that resists heat and adds structural rigidity without adding mass
• TIG-welded joints throughout: motorsport-grade precision welding for long-term durability under sustained high-RPM use
• Plug-and-play fitment: exhaust valve outlet fully compatible with the original ECU and wiring loom — no remapping required for installation
• Carbon fibre heat shield included: protects surrounding bodywork and rider while completing the race-replica appearance
• Euro 5 homologated: road-legal across the EU and UK, supplied with a homologation card

Performance Gains

The SC1-R is not merely a cosmetic upgrade. Independent testing on the Aprilia RSV4 1100 Factory shows a gain of +1.8 hp at 13,000 rpm and +1.4 Nm of torque at 7,500 rpm compared with the standard silencer. Power delivery is enhanced across the entire rev range from 5,000 to 13,000 rpm, sharpening throttle response on the way out of slow corners and extending the top-end rush that defines the RSV4 character. The complete unit weighs 4.6 kg versus 5.6 kg for the stock piece — a 1 kg reduction that improves the bike's mass centralisation and handling agility.

Sound Character

The SC1-R produces a deep, full-bodied V4 note that enriches every ride without crossing into antisocial territory. The tone is distinctly purposeful at low speeds and builds into a proper racing soundtrack at higher revs, all within the sound levels permitted under Euro 5 legislation. It is the correct balance between daily usability and genuine emotional engagement.

Build Quality and Materials

SC-Project manufactures the SC1-R in Italy using production standards drawn directly from its WorldSBK and MotoGP programmes. The titanium canister is formed and TIG-welded by hand, giving each unit a characteristic brushed-metal finish that develops its own patina over time. The hydroformed carbon fibre end cap is produced using a high-pressure forming process that ensures consistent wall thickness and eliminates weak points at stress-concentration zones. The included carbon fibre heat shield is finished to the same standard and mounts without modification to the original bracket points.

Fitment and Compatibility

This silencer is designed as a direct slip-on replacement for the following model:

• Aprilia RSV4 1100 Factory — model years 2021, 2022, 2023, 2024

The exhaust valve outlet is compatible with the original Aprilia ECU and wiring harness, making installation straightforward without specialist tools or electronic modifications.

What's in the Box

• SC-Project SC1-R slip-on silencer — titanium, part number A27A-91T
• Connecting pipe with exhaust valve outlet
• Carbon fibre heat shield
• Single-seat exhaust mounting bracket
• Mounting springs and fitting hardware
• SC-Project laser-etched logo
• SC-Project decal set
• Homologation card — Euro 5 road approval
• 24-month official SC-Project warranty

Specifications

• Part number: A27A-91T
• Type: slip-on silencer
• Canister material: titanium
• End cap: hydroformed carbon fibre
• Heat shield: carbon fibre
• SC weight: 4.6 kg
• Stock weight: 5.6 kg
• Weight saving: 1 kg
• Power gain: +1.8 hp at 13,000 rpm
• Torque gain: +1.4 Nm at 7,500 rpm
• Homologation: Euro 5
• Fitment: Aprilia RSV4 1100 Factory 2021-2024