Koyo Performance Radiator - BMW 3 Series / M3 E30 / E36
Koyo Performance Radiator - BMW 3 Series / M3 E30 / E36
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Universal fit
No vehicle selection needed.
This part may still fit. Check the details below or contact us before ordering. Ask about fitment
Fitment not confirmed
This part may still fit. Check the details below or contact us before ordering. Ask about fitment
Vehicle fitment
This part is listed to fit the following vehicles.
In Melbourne? Fit it in our workshop.
We fit parts in-house at the RevZone workshop. Book a time and bring your car in.
Description
Application: BMW 3 Series / M3 | E36 (M50 / S50 / S52) & E30 (M20) | Manual Transmission
Part Number: KH422674
The E36 M3 and E30 3 Series are icons of the BMW performance lineage - lightweight, driver-focused machines that remain a staple of track days, hillclimbs, and motorsport builds decades after production ended. Whether you're running a stock S50, a built S52, or a classic M20, keeping coolant temperatures in check is critical to protecting your engine under sustained hard driving.
Koyorad's all-aluminium KH422674 is a direct bolt-in performance upgrade engineered specifically for manual transmission E36 and E30 applications. 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 | KH422674 |
| BMW OEM | 1711 1 469 179 |
| FHP | 1 392 E36 |
Fitment
| Year | Make | Model | Chassis | Submodel |
|---|---|---|---|---|
| 1992-1999 | BMW | 3 Series / M3 | E36 | M50 / S50 / S52 - Manual Transmission |
| 1988-1991 | BMW | 3 Series | E30 | M20 - Manual Transmission |
Sold individually. Manual transmission fitment only. Lead times may apply - contact us for availability and shipping estimates.
Specifications
- Brand
- Koyo
- Part Number
- KH422674
- Core Thickness
- 48mm
- Core Dimensions (H × W)
- 431 × 550mm
- Tank Dimensions
- 55/55 × 435mm
- Inlet / Outlet Diameter
- Ø38mm / Ø38mm
- Drain Plug
- M14 × P1.5
- Construction
- All Aluminium, Nocolok Brazed, Heliarc Welded
- Transmission
- Manual (MT)
- Fan Shroud
- Retains OEM mounts
- Hoses
- Compatible with stock radiator hoses
- Fitment
- Direct bolt-in, no modifications required
Shipping
Orders are processed within 1-2 business days (Monday to Friday), and orders placed before 12pm AEST are usually dispatched the same day. Once dispatched, standard shipping takes 3-7 business days and express 1-3, with tracking emailed as your order leaves.
If part of your order is out of stock, we'll contact you with the option to split the shipment or hold it until everything is ready. Read the full shipping policy.
Returns
You have 14 days from delivery to request a return on unused parts in their original packaging. Refunds incur a 15% restocking fee (20% for special orders), or choose store credit and the full purchase value is applied to your account.
Parts that have been test fitted, installed, or used can't be returned, and special-order or overseas-ordered items are assessed case by case. Faulty or incorrectly supplied items are always covered at no cost to you. Read the full returns policy.
