Kinugawa K04 Turbocharger Upgrade — Mini Cooper S & JCW R55 R56 R57 / Peugeot 1.6T EP6

The Kinugawa K04 is a direct-fit performance turbocharger engineered to replace the factory K03/K04-4660 unit on 2007–2013 Mini Cooper S, JCW, and Peugeot/Citroën 1.6T EP6 engines — with zero modification required. It spools from 2,000 RPM, delivers strong mid-range torque, and is built for both daily street use and full race applications up to 320WHP.

The Kinugawa K04 turbocharger is the ultimate direct bolt-on upgrade for the Mini Cooper S and JCW (R55, R56, R57). Engineered with an advanced billet compressor wheel, it significantly reduces spool time while safely maximizing volumetric efficiency and horsepower. Shop trusted, high-performance upgrades at store.kinugawaturbosystems.com

Why Upgrade to the Kinugawa K04?

• Direct replacement for K04-4660 (OEM part numbers: 53039700118, 53039700181, 53039880163, 53039700121)
• Larger compressor housing than stock K03 for measurable power gains
• Spools at 2,000 RPM — no lag penalty over stock
• Billet compressor wheel options: 6+6 blades (better low-end torque & response) or 11+0 blades (higher top-end airflow)
• STS (Superior Turbine Strike) 9-blade turbine wheel — Kinugawa's advanced ceramic dual ball bearing technology for faster spool and longer service life. Learn more about STS →
• Full balance certified on Schenk MBRS110 (Germany) — brand new, not remanufactured
• Every unit ships with a Kinugawa Balance Report and Anti-Counterfeit Tag

Compatible Vehicles

Mini Cooper S / JCW (N14 & N18 engines)

• Mini Cooper S R55 R56 R57 — 175HP & 184HP variants (2007–2013)
• Mini Cooper S R58 R59 — 184HP
• Mini Cooper S / SX / X R60 R61 — 184HP

Peugeot (EP6DTS 1.6L THP)

• Peugeot RCZ 1.6 THP 200HP
• Peugeot 3008 / 207 / 207 RC / 308 1.6L THP 150–175HP

Citroën (EP6 1.6L THP)

• Citroën DS3 1.6L THP 150HP
• Citroën C4 1.6L THP 150HP

OEM Cross-Reference Numbers

11657647003 · 11657600890 · 11657565912 · 756542401 · V75556978004 · 11657595351 · 11657600881

Technical Specifications

• Compressor Wheel: 56.08 mm inducer / 39.3 mm exducer — Billet 6+6 or Billet 11+0 (6+6 = low-end response; 11+0 = top-end speed)
• Turbine Wheel: 45.6 mm inducer / 41.7 mm exducer — 9-blade STS
• Turbine Housing A/R: 5 cm²
• Actuator: Vacuum type
• Bearing Type: Journal bearing
• Cooling: Oil and water cooling

What's Included in the Box

• 1 × Kinugawa K04 Turbocharger
• 1 × Oil & Water Line Kit (#320-14033-001)
• 1 × Turbine Gasket Set (#413-02001-010 + #413-02002-017)
• 7 × Studs (#414-09101-009 ×7 + #414-10101-004 ×7)
• 1 × Kinugawa Balance Report with Anti-Counterfeit Tag

Installation Kit

Condition & Quality Assurance

• Brand New — not remanufactured or refurbished
• Full balance performed on Schenk MBRS110 (Germany)

Warranty

Kinugawa Turbo Systems backs every unit with a 1-Year Trouble-Free Warranty from the date of purchase for the original buyer. If your turbocharger fails or develops any issue within the warranty period, return it for a free overhaul, recondition, or replacement — depending on availability and the nature of the fault.

For best results at race power levels, pair with a high-flow, low-back-pressure aftermarket exhaust system.

Sold by Kinugawa Turbo Systems — the original manufacturer. Every unit is traceable via our Anti-Counterfeit Tag program.