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 with ethanol, fuel pump upgrade, manifold, intake, and custom tune.
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.