SC-Project S1 titanium slip-on silencer Yamaha YZF-R1 RN49 2017-2019 Y11B-T41T
⟲ 360° — drag me
1.2 k g
02 · Data & docs

The facts.

Technical data
BrandSC-Project
ModelS1 Slip-On
Part NumberY11B-T41T
FitmentYamaha YZF-R1 / YZF-R1M RN49 (2017-2019)
MaterialFull titanium body, carbon fibre end cap, carbon heat shield
Silencer Weight1.2 kg (OEM: 1.5 kg — saving 0.3 kg)
Power Gain+1.2 hp at 12,000 rpm
Torque Gain+0.9 Nm at 11,900 rpm
HomologationEURO 4, EC and TÜV road-legal
DescriptionThe whole story▼

The SC-Project S1 is one of the most respected slip-on silencers in superbike racing, and this titanium version brings that same race-bred engineering directly to your Yamaha YZF-R1 or YZF-R1M RN49 (2017-2019). Road-legal under EURO 4, it delivers a genuine gain in power and torque the moment you leave the garage — no ECU remapping required, no compromise on daily rideability.

Key Features

  • EURO 4 road-legal approval (EC and TÜV homologation) — fully compliant for everyday street use with dB-killer included
  • Measured performance gains of +1.2 hp at 12,000 rpm and +0.9 Nm torque at 11,900 rpm over the standard system
  • Weight saving of 0.3 kg compared to the OEM silencer (SC-Project S1: 1.2 kg vs stock: 1.5 kg) for a lighter, more responsive feel
  • Full titanium construction with CNC-machined titanium bushings and TIG-welded titanium joints for long-term durability and heat resistance
  • Matte carbon fibre end cap and titanium flame mesh outlet deliver a purposeful racing aesthetic without sacrificing legality
  • Full titanium link pipe included for a direct, clean connection to the original catalytic converter

Construction and Craftsmanship

SC-Project designed the S1 around a conical full-titanium silencer body — the same tapered geometry you see on factory World Superbike machinery. Every weld is TIG-finished by hand, and the CNC-machined titanium bushings ensure each joint is precise and rattle-free over the long term. The matte carbon fibre end cap handles extreme outlet temperatures with ease, while the carbon heat shield included in the kit adds a layer of thermal protection and a cohesive look that elevates the entire rear of the bike.

High-temperature acoustic damping material within the canister has been tuned specifically for the crossplane-crank character of the R1 engine, producing a deep, dark, aggressive race note that builds with revs. The titanium flame mesh at the outlet is a detail borrowed straight from SC-Project's competition catalogue.

Sound and Road Use

With the dB-killer fitted, the S1 sits within EURO 4 noise limits and is fully road-legal throughout Europe. Remove it for track days and the exhaust note opens up considerably, revealing the full acoustic presence that has made this system a favourite among R1 trackday riders. The transition between the two states is straightforward — the dB-killer seats securely and can be swapped in minutes at the paddock.

Installation

The S1 is a genuine bolt-on replacement requiring no fuelling changes or ECU modification. The included full titanium link pipe mates directly to the original catalytic converter and uses the stock mounting points, so fitment is clean, tight and permanent. Mounting springs and bolts are supplied in the kit alongside the homologation card and SC-Project decals. The entire installation can realistically be completed with basic tools in under an hour.

Fitment and Compatibility

This SC-Project S1 slip-on silencer is designed exclusively for the following models:

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

Fits all EURO 4 variants of the RN49 generation. Confirm your model year before ordering.

Specifications

  • Part number: Y11B-T41T
  • Type: slip-on silencer with titanium link pipe
  • Material: full titanium body, carbon fibre end cap, carbon heat shield
  • Silencer weight: 1.2 kg (OEM: 1.5 kg — saving 0.3 kg)
  • Power gain: +1.2 hp at 12,000 rpm
  • Torque gain: +0.9 Nm at 11,900 rpm
  • Homologation: EURO 4, EC and TÜV road-legal
  • dB-killer: included
  • Warranty: 24 months (official SC-Project)
What's includedEverything in the box▼
  • SC-Project S1 slip-on silencer (titanium)
  • Full titanium link pipe for direct fitment to original catalytic converter
  • Carbon fibre heat shield
  • Mounting springs and bolts
  • SC-Project decals
  • Homologation card
FitmentWhich bikes this fits▼
  • Yamaha YZF-R1/M RN49 (2017–2019)
07 · Support

Questions, one topic at a time.

Estimate your shipping

Get the real shipping cost for this item to your address — the same rates as checkout.

Pick your countrySame rates as checkout

Choose a destination and hit Estimate — we fetch the live rates for this item.

How long does delivery take?

We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.

How much does shipping cost?

Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.

Do you ship to my country?

Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.

Will I have to pay customs or import duties?

Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.

How can I track my order?

As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.

What if an item is out of stock?

On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.

Didn’t find your answer?

Our team will personally help you choose the right gear or part — around 24h for a reply.