SC-Project SC1-S Slip-On Silencer Yamaha YZF-R1/M RN49 2017-2019 Y11B-T124

Evolved directly from the race-proven SC1-R, the SC-Project SC1-S slip-on silencer represents the pinnacle of Italian exhaust craft — T.I.G.-welded titanium construction, a carbon fibre twill end cap, and a black metal outlet element combine to give the Yamaha YZF-R1/M RN49 an unmistakable racing character without sacrificing road legality.

Key Features

• EURO 4 road-legal homologation — fully compliant with EC and TÜV approval, no modifications required for street use
• Titanium link pipe connects directly to the original catalytic converter for a clean, factory-confident fitment
• CNC-machined titanium collars and T.I.G.-welded titanium joints deliver exceptional dimensional accuracy and long-term durability
• Carbon fibre twill end cap resists sustained heat while projecting an uncompromising track aesthetic
• Includes dB killer and specific block system — aggressive racing acoustics kept within legal sound limits on the road
• No ECU remapping required — bolt on and ride immediately
• Available in two part-numbered variants: Titanium (Y11B-T124T) and Carbon (Y11B-T124C)

Build Quality and Materials

SC-Project's Italian heritage is evident in every weld and machined surface of the SC1-S. The canister body is fabricated from aerospace-grade titanium, joined throughout by hand-finished T.I.G. welds that ensure structural integrity under sustained high-rpm use. CNC-machined titanium collars guarantee a precise slip-on fit with zero play, while heat-resistant acoustic insulation maintains consistent sound character across all operating temperatures. The carbon fibre twill end cap — a hallmark of SC-Project's top-tier range — adds visual drama and genuine thermal performance in equal measure. The black metal outlet element completes the look with a seamless, purposeful finish.

Performance on Road and Track

The SC1-S is engineered to liberate measurable gains over the stock exhaust system. Dyno testing on the Yamaha YZF-R1/M RN49 demonstrates an increase of +1.5 hp at 12,000 rpm and +1.0 Nm of torque at 12,100 rpm, delivered through an optimised exhaust flow path that improves gas scavenging and throttle response across the rev range. The titanium link pipe is shaped to maintain ideal back-pressure characteristics, keeping power delivery smooth and linear whether you are navigating road traffic or chasing lap times. Because no ECU recalibration is needed, the transition from factory exhaust to SC1-S is genuinely straightforward.

Sound Character

The SC1-S is celebrated for a deep, dark, resonant exhaust note that amplifies the crossplane character of the R1 engine without becoming antisocial on the road. A purpose-designed dB killer and block system are included as standard, maintaining legal compliance while preserving the throaty, layered acoustic profile that distinguishes an SC-Project exhaust from any aftermarket alternative. Remove the dB killer for track days and the SC1-S reveals the full-throated voice it inherited from its SC1-R lineage.

Fitment and Compatibility

The SC-Project SC1-S Y11B-T124 is designed and approved for the following motorcycles:

• Yamaha YZF-R1 RN49 (2017, 2018, 2019)
• Yamaha YZF-R1M RN49 (2017, 2018, 2019)
• All EURO 4 variants of the above models

The titanium link pipe mates directly with the original catalytic converter, retaining the standard mid-pipe and collector. No additional brackets or adaptors are required.

Specifications

• Brand: SC-Project
• Model: SC1-S
• Type: Slip-on silencer
• Part number — Titanium: Y11B-T124T
• Part number — Carbon: Y11B-T124C
• Main material: Titanium
• End cap: Carbon fibre twill
• Outlet element: Black metal
• Link pipe: Titanium
• Clamp: Titanium
• Joints: T.I.G.-welded titanium
• Collars: CNC-machined titanium
• Homologation: EURO 4 (EC / TÜV road legal)
• Power gain: +1.5 hp at 12,000 rpm
• Torque gain: +1.0 Nm at 12,100 rpm
• ECU remap required: No
• Fitment: Yamaha YZF-R1/M RN49 (2017-2019)