⟲ 360° — drag meThe facts.
| Brand | SC-Project |
|---|---|
| Model | S1 Slip-On |
| Part Number | Y11C-T41T |
| Fitment | Yamaha YZF-R1/M RN65 (2020-2026) |
| Silencer Material | Full titanium |
| End Cap | Carbon fibre with acoustic damping material |
| Link Pipe | Full titanium |
| Homologation | EC and TÜV, Euro 5 |
| Warranty | 24 months (SC-Project official) |
DescriptionThe whole story▼
Euro 5 road approval and genuine WSBK-derived engineering — the SC-Project S1 Slip-On for the Yamaha YZF-R1/M RN65 (2020-2026) is the rare silencer that delivers full legal compliance without a single compromise on performance or sound. Constructed entirely in titanium and certified to EC and TÜV standards, the S1 gives you a measurable power gain, a deep racing exhaust note, and a kit that bolts straight on without ECU remapping.
Key Features
- EC and TÜV homologated to Euro 5 — fully legal for road use, dB-killer included as standard
- +1.4 hp at 12,000 rpm and +1.1 Nm torque at 12,250 rpm over the stock silencer
- Weight saving of 0.3 kg: S1 unit weighs 1.2 kg versus 1.5 kg OEM
- Full titanium silencer body and full titanium link pipe for direct fitment to the OE catalyst and header
- Carbon end cap with specialist acoustic damping material for a deep, unmistakeable racing tone
- No ECU tuning required — direct bolt-on installation, ready to ride immediately
Homologation and Legal Compliance
The S1 carries official EC and TÜV approval, conforming fully to Euro 5 emissions and noise regulations. The supplied dB-killer brings the exhaust note within legal limits on public roads while still producing the deep, pressurised sound that defines SC-Project's racing heritage. The homologation card is included in the box, so the paperwork is handled from day one.
Unlike many performance systems that force a choice between road legality and genuine character, the S1 holds both. Remove the dB-killer for closed circuit use and the character of the full titanium construction becomes immediately apparent.
Performance and Engineering
SC-Project's motorsport division has campaigned exhausts in the Superbike World Championship for years, and the S1's architecture reflects that lineage directly. The full titanium link pipe creates a straight, unobstructed connection to the OE catalyst, which is why no remapping is needed — the flow geometry is optimised for the standard fuelling map. The result is a clean, consistent +1.4 hp at 12,000 rpm and a +1.1 Nm torque improvement at 12,250 rpm, precisely where the R1's crossplane inline-four is working hardest.
Hydroforming technology shapes the pipes without seams or welds at stress points, and every joint is finished with TIG welding for long-term durability under sustained high-temperature cycling. The carbon heat shield included in the kit protects surrounding bodywork and rider hardware from the elevated temperatures titanium generates in use.
Materials and Craftsmanship
The silencer canister is full titanium — not a titanium-coated steel unit — chosen for its exceptional strength-to-weight ratio and resistance to corrosion and heat discolouration over time. The carbon fibre end cap is formed with the same precision tooling used on SC-Project's track-only catalogue, providing a visual signature that is immediately recognisable and structurally integral rather than decorative.
Together, titanium, carbon fibre, and hydroformed pipework represent SC-Project's benchmark for design and performance in the road-legal slip-on segment.
Fitment and Compatibility
This exhaust is designed and homologated specifically for the following motorcycles:
- Yamaha YZF-R1 RN65 — 2020, 2021, 2022, 2023, 2024, 2025, 2026
- Yamaha YZF-R1M RN65 — 2020, 2021, 2022, 2023, 2024, 2025, 2026
Compatible with all Euro 5 variants of the RN65 generation. Connects directly to the OE catalyst and header; no additional adaptors or ECU modification required.
Specifications
- Part number: Y11C-T41T
- Silencer material: full titanium
- End cap: carbon fibre with acoustic damping material
- Link pipe: full titanium
- Silencer weight: 1.2 kg (OEM: 1.5 kg — saving: 0.3 kg)
- Power gain: +1.4 hp at 12,000 rpm
- Torque gain: +1.1 Nm at 12,250 rpm
- Homologation: EC and TÜV, Euro 5
- ECU remap required: no
- Warranty: 24 months (SC-Project official)
What's includedEverything in the box▼
- SC-Project S1 slip-on silencer (titanium)
- Full titanium link pipe for direct fitment to OE catalyst
- Carbon fibre heat shield
- Mounting springs and bolts
- SC-Project sticker set
- Homologation card for road use
FitmentWhich bikes this fits▼
- Yamaha YZF-R1/M RN65 (2020–2026)
Questions, one topic at a time.
Get the real shipping cost for this item to your address — the same rates as checkout.
Choose a destination and hit Estimate — we fetch the live rates for this item.
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.
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.
Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.
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.
As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.
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.
You have the right to cancel within 14 days of receiving your order. Register your return by email first; once it’s approved you have a further 14 days to send the goods back. Items should be unused and in their original packaging.
Register your return by email with your order number before sending anything back, and we’ll send you the return instructions. Please note: returns that aren’t registered in advance can’t be accepted.
The quickest way is to place a new order for the size you need and register a return for the original by email — just let us know it’s an exchange.
We’re sorry — that shouldn’t happen. Contact us with your order number and a photo as soon as you can, and we’ll arrange a replacement or refund right away. Faulty goods are always covered by your statutory warranty.
Refunds go back to your original payment method, usually within 3–5 working days of your return reaching our warehouse.
PayPal, all major credit and debit cards (Visa, Mastercard, American Express), Klarna (pay later and instalments), Apple Pay, Google Pay and more — all processed securely via PayPal and Mollie.
Yes. Choose Klarna at checkout to split your purchase into flexible monthly installments.
Your payment is taken when you place your order. If you choose Klarna, you pay later according to Klarna’s terms.
Every payment runs over an SSL-encrypted connection through certified providers. We never see or store your full card details.
If your order hasn’t shipped yet, contact us as soon as possible and we’ll do our best to change or cancel it.
No — you can check out as a guest. An account simply lets you track orders and reorder faster.
For customers in the EU, prices are shown including your country’s local VAT. For customers outside the EU, prices are shown without VAT — instead, your country’s import taxes and duties may apply on delivery (see the customs question).
Yes. Your invoice is attached to your order confirmation email and is also available in your account.
Yes. We’re an authorised dealer, so every product is 100% original and comes with the full manufacturer warranty.
Yes. Everything we sell is genuine and comes with the manufacturer’s warranty, on top of your statutory rights. Keep your invoice as proof of purchase and contact us if you ever need to make a claim — we’ll help you through it.
Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.