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SC-Project STREET SC1-S Full Exhaust System Yamaha YZF-R7 (2021-2025) Y36A-C125

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Variant: Carbon
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  • 14-day returns — in stock ships within 24h
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The SC-Project STREET SC1-S is a complete, road-legal full exhaust system engineered specifically for the Yamaha YZF-R7 (2021-2025), delivering genuine performance gains, a 2 kg weight saving and a deep, sonorous exhaust note — all within EURO 5 compliance. Whether you commute during the week or push on trackdays at the weekend, this system gives you race-derived technology without compromise on legality or all-day rideability.

Key Features

  • +1.6 hp at 10,000 rpm and +2.3 Nm torque at 4,750 rpm over the stock exhaust — sharper acceleration and stronger mid-range pull
  • 2 kg weight reduction (SC-Project system: 5.7 kg vs. stock: 7.7 kg) for improved handling and chassis balance
  • EURO 5 compliant with EC and TÜV certification — fully road-legal straight from the box
  • AISI 304 stainless steel headers, T.I.G.-welded throughout for exceptional heat resistance and long service life
  • CNC-machined titanium sleeves ensure precise fitment and optimised exhaust flow
  • SC1-S silencer available in carbon or titanium, each finished with a carbon end cap for a racing aesthetic
  • Carbon fibre heat shield included, adding thermal protection and a track-ready visual detail

Performance and Weight Savings

Removing unnecessary stock components and optimising the exhaust routing, the 2-1 AISI 304 stainless steel header feeds directly into the SC1-S silencer, reducing back-pressure and lowering operating temperatures. The result is a measurable improvement at both ends of the rev range: +1.6 hp at 10,000 rpm sharpens top-end urgency, while +2.3 Nm at 4,750 rpm fills in the mid-range for more confident, linear throttle response on the road. Shedding 2 kg from the exhaust position also noticeably lifts the YZF-R7's agility through direction changes and tightens its overall balance.

Sound and Road Legality

The SC1-S silencer produces a deep, bass-rich tone that rewards the R7's parallel-twin character without crossing legal noise limits. The system meets EURO 5 standards and carries EC and TÜV type approval, so it can be ridden on public roads across Europe without modification. Riders looking for that unmistakable SC-Project soundtrack — rich, purposeful and authoritative — without the restrictions of a track-only can will find this system hits the mark precisely.

Materials and Construction

SC-Project builds the STREET SC1-S using the same fabrication standards as its race catalogue. The full 2-1 header is constructed from AISI 304 stainless steel and joined with T.I.G. welding for a clean, durable finish. CNC-machined titanium sleeves connect each section with tight tolerances, eliminating leaks and ensuring consistent flow geometry. The SC1-S canister itself is offered in either a titanium or carbon finish, with a carbon end cap on both variants. The included carbon fibre heat shield rounds out the package with both a practical and visual upgrade over the stock system.

Fitment and Compatibility

This system is a direct, bolt-on replacement designed and tested exclusively for the Yamaha YZF-R7, covering model years 2021 through 2025. No cutting, fabrication or custom bracketing is required. The single-seat exhaust bracket supplied in the kit ensures correct alignment and a secure, rattle-free mount.

What's Included

  • SC-Project SC1-S slip-on silencer (titanium or carbon, depending on part number selected)
  • Complete 2-1 header in AISI 304 stainless steel
  • Carbon fibre heat shield
  • Single-seat exhaust bracket
  • Mounting springs and bolts
  • SC-Project laser-engraved logo badge
  • SC-Project stickers
  • 24-month official SC-Project warranty
  • Homologation card for EC and TÜV approval

Part Numbers

  • Carbon version: Y36A-C125C
  • Titanium version: Y36A-C125T

Specifications

  • Brand: SC-Project
  • Model: STREET SC1-S
  • Part number: Y36A-C125
  • Fitment: Yamaha YZF-R7 (2021-2025)
  • System type: Full exhaust system (2-1)
  • Header material: AISI 304 stainless steel
  • Silencer finish: Carbon (Y36A-C125C) or Titanium (Y36A-C125T)
  • System weight: 5.7 kg
  • Weight saving vs. stock: -2 kg (stock: 7.7 kg)
  • Power gain: +1.6 hp at 10,000 rpm
  • Torque gain: +2.3 Nm at 4,750 rpm
  • Emissions compliance: EURO 5 (EC and TÜV certified)
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