Koyorad Performance Radiator for Mitsubishi Lancer Evolution 4/5/6 4G63 MT | HH030939
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Description
Koyo Performance Radiator – Mitsubishi Lancer Evolution IV / V / VI 4G63 MT
Application: Mitsubishi Lancer Evolution IV / V / VI | CF-CP9A / E-CN9A / GF-CP9A | 4G63 | Manual Transmission
Part Numbers: KH030939 (Koyorad Japan) / HH030939 (Koyorad)
The Lancer Evolution IV, V, and VI are among the most iconic all-wheel-drive performance cars ever built — homologation specials born from Mitsubishi's World Rally Championship programme, powered by the legendary turbocharged 4G63. Whether you're running a stock Evo or a built motor pushing serious power, keeping coolant temperatures in check is critical to protecting the 4G63 under sustained high-load conditions on track or on the stages.
Koyorad's all-aluminium KH030939 is a direct bolt-in performance upgrade engineered specifically for manual transmission Evo IV, V, and VI models. Nocolok furnace brazed, precision TIG welded by hand, and triple pressure tested — it retains all OEM fan shroud mounts and stock hose connections with no modifications required.
Why Koyorad?
- Precise Tube & Fin Alignment — Strict quality control ensures optimal coolant flow and maximum heat transfer efficiency across the entire core.
- Nocolok Furnace Brazing — All tubes, fins, headers, and brackets are bonded in a state-of-the-art Nocolok furnace, creating a structure that resists vibration, road debris, and the elements.
- Billet Filler Neck — Precision-machined billet filler necks are fitted to every unit for superior strength, durability, and a reliable seal.
- OE-Specific Mounting — Application-specific mounting points for fan shrouds, inlet/outlet hoses, and top/bottom pins ensure a pain-free, no-modification install.
- Hand-Crafted Heliarc Welds — Each radiator is individually Heliarc welded by hand, creating the strongest possible aluminium-to-aluminium bond across all components.
Cross Reference
| Koyorad | KH030939 |
| Mitsubishi OEM | TBA |
Fitment
| Year | Make | Model | Chassis | Submodel |
|---|---|---|---|---|
| 1996–1998 | Mitsubishi | Lancer | CN9A (4D Sedan) | Evolution IV — 4G63T 2.0L Turbo Petrol AWD (206kW) |
| 1998–1999 | Mitsubishi | Lancer | CP9A (4D Sedan) | Evolution V — 4G63T 2.0L Turbo Petrol AWD (206kW) |
| 1999–2001 | Mitsubishi | Lancer | CP9A (4D Sedan) | Evolution VI — 4G63T 2.0L Turbo Petrol AWD (206kW) |
If you're unsure whether this will fit your vehicle, contact our team of experts via email at hello@iilumolab.com and send through a few photos of the car for us to verify fitment.
Installation Notes
- MT Only — Manual transmission models only.
- Fan: Must use Evolution 7/8/9 fan.
- Evo 7/8/9 compatibility: Can be installed to Evolution 7/8/9 for better turbo/manifold clearance. Evo 6 upper hose required, stock fan will mount, but stock air intake system is not compatible.
Sold individually. Manual transmission fitment only. Lead times may apply — contact us at iilumolab for availability and shipping estimates.
iilumolab is an Authorised Australian Distributor of Koyorad Performance Radiators.
Shop with confidence — all Koyorad products sold through iilumolab are genuine, backed by manufacturer support, and shipped from Australia.
We always recommend professional fitment for guaranteed satisfaction. If you're wanting a hassle-free installation, feel free to contact our friendly team as we offer installation services in-store at our Melbourne workshop. For more details, contact us here.
Note
Upon receiving the item, please ensure that the part is indeed the correct item you have ordered. This can be achieved by checking labels on the packaging. Please also ensure a proper test fit of the item is conducted prior to paint and/or installation. Returns/Warranty claims will be voided if the item has been tampered with, or is no longer in resalable/new condition.