SC-Project S1 Slip-On Silencer + Cat Replacement Pipe Kawasaki ZX-10 R/RR (2021-2026) K38A-DET41T

Built to the same exacting standards found in the MotoGP and WorldSBK paddocks, the SC-Project S1 Slip-On Silencer with catalyst replacement pipe for the Kawasaki ZX-10 R/RR (2021–2026) is a masterclass in aerospace-grade titanium fabrication. Every weld, every CNC-machined bush, every hydroformed curve reflects SC-Project's obsession with material integrity — delivering a weight saving of 6.55 kg over the stock system while pushing 124 dB of pure, uncorked racing tone at 7,000 rpm.

Key Features

• Hydroformed titanium canister construction (part number K38A-DET41T) — maximum structural rigidity at minimal weight, with the SC-Project finishing quality that defines the best Italian exhaust craft
• Carbon fibre end cap for aggressive track aesthetics and outstanding thermal resistance under sustained high-rpm running
• T.I.G.-welded titanium joints throughout — each seam laid by hand for a leak-free, race-durable connection that outlasts conventional MIG welding
• CNC-machined titanium mounting bushes ensure a precise, rattle-free fit specific to the ZX-10 R/RR airframe
• Titanium catalyst replacement link pipe optimises exhaust gas flow, reduces heat build-up and unlocks the full performance potential of the system
• Weight: 0.95 kg (SC-Project system) versus 7.5 kg stock — a saving of 6.55 kg, directly improving chassis agility and lap-time potential
• 70 mm outlet diameter and no dB-killer fitted — 124 dB at 7,000 rpm, no compromise

Construction & Material Quality

SC-Project's S1 series begins with sheet titanium that is hydroformed under controlled pressure into the canister's characteristic conical profile. This single-piece shaping technique eliminates internal welds within the body itself, producing a structurally uniform shell that resists fatigue cracking at the extreme temperature cycles a Superbike exhaust endures. The external T.I.G. welds at every junction are executed by certified welders to aerospace tolerances, visible as the signature straw-blue titanium bead that has become shorthand for Italian exhaust excellence.

The carbon fibre end cap is laid and cured to SC-Project's in-house specification, providing a heat shield that complements the titanium body and delivers the uncompromising visual identity associated with factory Superbike machinery. CNC-machined titanium bushes at the mounting points guarantee correct geometry alignment on the ZX-10 R/RR sub-frame without shimming or adjustment.

Performance & Sound

Pairing the S1 canister with the titanium catalyst replacement pipe transforms the ZX-10 R/RR's exhaust path into a straight, optimised flow route. Removing the catalytic converter reduces exhaust back-pressure, liberates additional power across the rev range, and sharpens throttle response — effects that are amplified when combined with an ECU remap calibrated to the new exhaust characteristics. The 70 mm outlet produces a deep, aggressive racing note rated at 124 dB at 7,000 rpm; there is no dB-killer included, as this system is designed exclusively for closed-circuit use where noise limits do not apply.

Fitment & Compatibility

This exhaust system is engineered as a direct-fit slip-on replacement for the following models:

• Kawasaki ZX-10 R (2021, 2022, 2023, 2024, 2025, 2026)
• Kawasaki ZX-10 RR (2021, 2022, 2023, 2024, 2025, 2026)

The catalyst replacement link pipe replaces the OEM mid-section catalyst and is specific to the above year range. No modifications to the sub-frame or mounting points are required; the CNC-machined titanium bushes align directly with the factory hangers.

Important Notice

This exhaust system has no road homologation. It is developed and approved for racing use only (FOR RACING USE ONLY) and must not be used on public roads. Installation and use on public roads may be illegal in your jurisdiction and will void any applicable road-use warranty.

Specifications

• Part number: K38A-DET41T
• Brand: SC-Project
• Type: Slip-on silencer with catalyst replacement pipe
• Canister material: Titanium (hydroformed)
• End cap material: Carbon fibre
• Connection material: Titanium (T.I.G.-welded)
• Outlet diameter: 70 mm
• Sound level: 124 dB at 7,000 rpm
• System weight: 0.95 kg
• OEM system weight: 7.5 kg
• Weight saving: 6.55 kg
• dB-killer: Not included
• Road homologation: None — racing use only
• Warranty: 24 months SC-Project official warranty
• Fitment: Kawasaki ZX-10 R / ZX-10 RR (2021–2026)