SC-Project GP70-R Slip-On Silencer + De-Cat Titanium Link Pipe for Yamaha YZF-R1/M RN49 (2017-2019) Y11B-DET70

Forged from precision-machined aluminium, hand-welded titanium and (where specified) hand-laid carbon fibre, the SC-Project GP70-R Slip-On with de-cat titanium link pipe represents the company's most uncompromising exhaust solution for the Yamaha YZF-R1 and YZF-R1M RN49 generation. Every joint, every weld and every CNC-milled sleeve reflects a manufacturing standard drawn directly from SC-Project's MotoGP programme — delivered in a package that strips 6.2 kg from your machine's exhaust system alone.

Key Features

• Dramatic 6.2 kg weight reduction over the stock system (SC-Project system: 1.8 kg vs. OEM: 8 kg), improving mass centralisation, turn-in and overall agility
• De-cat titanium link pipe replaces the catalytic converter section for unrestricted exhaust flow and reduced heat soak into the airbox
• CNC-milled bushings and T.I.G.-welded titanium connections ensure a gas-tight, rattle-free fit under sustained track use
• Ø70 mm outlet diameter — the same aggressive MotoGP silhouette that defines SC-Project's racing heritage
• Two finish options: Titanium (Y11B-DET70T) with laser-engraved SC-Project logo, or Carbon (Y11B-DET70C) with riveted racing plaque
• Compatible with the original pillion footpegs and pre-drilled for the OEM lambda sensor connection

Construction and Material Quality

SC-Project's commitment to build quality is evident in every detail of the GP70-R. The titanium link pipe withstands the extreme thermal cycling of track sessions without distortion, while the CNC-machined sleeve interfaces guarantee a precise, leak-free slip-on fitment every time. T.I.G. welding — applied by hand — produces cleaner, stronger beads than automated MIG processes, and the result is an exhaust that looks as purposeful as it performs.

The titanium variant carries a laser-etched SC-Project logo that resists fading under heat, while the carbon version features a hand-riveted racing identification plaque that gives the can a distinctly pit-lane aesthetic. Both variants share the same internal construction and deliver identical acoustic and performance characteristics.

Performance and Sound

Removing 6.2 kg from a concentrated, high-mounted location lowers the centre of gravity and measurably reduces rotational inertia in direction changes. Paired with the de-cat link pipe's optimised exhaust gas routing, throttle response sharpens noticeably across the mid-range — precisely the range that matters on track exits. Without the dB killer fitted, the GP70-R produces 123 dB at 6,500 rpm: a raw, pressurised racing note that echoes SC-Project's factory MotoGP sound character and leaves no ambiguity about the bike's intent.

Important Safety Notice

This exhaust system is designed exclusively for closed-course competition use. It does not carry road-use type approval and must not be used on public roads. The system removes the catalytic converter; use on public roads is prohibited.

Fitment and Compatibility

The SC-Project GP70-R Slip-On and de-cat titanium link pipe (Y11B-DET70) is engineered specifically for the following models:

• Yamaha YZF-R1 RN49 — model years 2017, 2018, 2019
• Yamaha YZF-R1M RN49 — model years 2017, 2018, 2019

The system retains compatibility with the original pillion footrest hangers and includes provision for the OEM lambda sensor, simplifying installation.

What's in the Box

• GP70-R slip-on silencer (titanium or carbon finish, depending on part number selected)
• De-cat titanium link pipe
• Mounting springs and bolts for secure installation
• SC-Project sticker set
• 24-month official SC-Project warranty

Specifications