SC-Project GP70-R Slip-On Silencer Honda CBR 1000 RR SC77 (2017-2019) H15A-HT70

Developed with MotoGP and World Superbike racing DNA, the SC-Project GP70-R slip-on silencer for the Honda CBR 1000 RR SC77 (2017-2019) is an uncompromising track weapon. With a proven gain of +2.5 hp at 7,200 rpm and +2.6 Nm torque at 6,900 rpm, paired with a 2.2 kg weight saving over the stock unit, this is the exhaust upgrade that transforms your CBR into a genuine circuit machine.

Key Features

• Measurable performance gains: +2.5 hp at 7,200 rpm and +2.6 Nm at 6,900 rpm over the stock exhaust
• Significant weight reduction of 2.2 kg — SC-Project canister weighs just 1.1 kg versus 3.3 kg stock
• Large 70 mm outlet for unrestricted exhaust flow and an unmistakable MotoGP-inspired sound signature without a dB killer
• Full-titanium connecting link pipe with T.I.G. welding for superior heat management and peak power delivery
• CNC-machined titanium sleeves for precision fitment and optimised exhaust routing
• Laser-engraved SC-Project logo for an exclusive racing finish

Track-Focused Performance

The GP70-R is SC-Project's pure racing slip-on, designed from the outset for lap-time gains rather than road compliance. The ultra-lightweight titanium link pipe improves exhaust gas scavenging, contributing to sharper throttle response and stronger mid-range pull — exactly the characteristics that reward aggressive riding on the circuit. Optimised internal flow geometry raises exhaust throughput, meaning the CBR 1000 RR SC77 breathes more freely across the entire rev range.

By combining ultralight carbon or titanium materials, the GP70-R reduces unsprung and rotating mass, improving the chassis balance and agility that is already one of the SC77 generation's strongest suits.

Sound & Construction

Fitted without a dB killer, the GP70-R delivers the deep, aggressive and full-volume exhaust note that defines MotoGP and World Superbike paddocks. The 70 mm outlet is central to this character — wider than most aftermarket alternatives, it reduces back-pressure and lets the CBR's inline-four sing at its natural frequency. T.I.G.-welded titanium components throughout ensure structural integrity under sustained high-rpm track use, while the sport and retro-influenced canister shape draws direct visual inspiration from SC-Project's top-tier racing programmes.

Materials & Craftsmanship

Two canister variants are available: a carbon fibre version (H15A-HT70C) and a titanium version (H15A-HT70T). Both share the full-titanium link pipe, CNC-machined titanium sleeves and T.I.G.-welded joints. This combination of high-end materials and precision manufacturing makes the GP70-R one of the most technically accomplished slip-on upgrades available for the CBR 1000 RR SC77 platform.

Important Notice

This exhaust system is developed exclusively for racing use and is not road-legal (FOR RACING USE ONLY). It must not be used on public roads.

Fitment & Compatibility

• Honda CBR 1000 RR SC77 — model years 2017, 2018, 2019

Part Numbers

• Carbon version: H15A-HT70C
• Titanium version: H15A-HT70T

Specifications