Koyorad Performance Radiator for Honda Civic EF / CR-X MT 1987-1997
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Description
Koyo Aluminium Performance Radiator – Honda Civic EF / CRX MT (1987–1997)
Application: Honda Civic MT / Honda CRX MT | E-EF2 / E-EF3 / E-EF4 / E-EF5 / E-EF6 / E-EF7 | D15B / ZC | Manual Transmission
Part Number: KH080146 | KS080146
Koyo aluminium performance radiators are engineered as direct-fit replacements for the factory radiator, with increased cooling capacity and durability for demanding use. Each unit is designed to maintain stable coolant temperatures in street, track day and competition environments, while retaining factory mounting points and hose connections for straightforward installation. Made in Japan.
The Honda Civic EF and CRX are two of the most iconic lightweight Honda platforms — nimble, rev-happy, and endlessly tuneable. Whether you're running a stock D15B daily or a built ZC track car, the Koyorad KH080146 is a direct bolt-in upgrade that delivers the cooling performance your build deserves.
Features
- High-quality all-aluminium construction with TIG-welded tanks
- Increased core thickness and surface area compared to OEM radiators
- Optimised fin density and tube design for efficient heat transfer
- Direct-fit design using factory mounting locations and fan shrouds
- Designed to work with standard radiator caps and coolant hoses
- Pressure-tested for reliability under sustained high load and temperature
Performance Benefits
- Improved coolant temperature stability in track, towing or high-power applications
- Reduced risk of heat-soak and overheating during repeated hard use
- Greater durability than plastic-tank OEM radiators, especially with age and vibration
- Suitable foundation for further performance upgrades such as higher boost levels or track use
Specifications
| Part Number | KH080146 / KS080146 |
| Core Type | 25mm |
| Core Dimensions (H × W) | 325 × 660/684mm |
| Tank Dimensions | 35/35 × 687mm |
| Inlet / Outlet Diameter | ⌢32mm (top and bottom) |
| Filler Neck | Yes |
| Construction | All Aluminium, TIG Welded, Lightweight |
| Transmission | Manual (MT) — DOHC |
| Origin | Made in Japan |
| Fitment | Direct bolt-in, no modifications required |
Cross Reference
| Koyorad | KH080146 / KS080146 |
| Honda OEM | 19010 PM3 305 / 19010 PM3 901 |
Fitment Table
| Year | Make | Model | Chassis | Submodel |
|---|---|---|---|---|
| 1987.09–1991.09 | Honda | Civic | E-EF2 | MT — D15B |
| 1987.09–1991.09 | Honda | Civic | E-EF3 | MT — ZC |
| 1987.09–1989.09 | Honda | Civic | E-EF4 | MT — D15B |
| 1987.09–1997.02 | Honda | Civic | E-EF5 | MT — ZC |
| 1987.09~ | Honda | Civic | E-EF7 | MT — ZC |
| 1987.09–1992.02 | Honda | CR-X | E-EF6 | MT — D15B |
| 1987.09–1992.02 | Honda | CR-X | E-EF7 | MT — ZC |
Sold individually. Manual transmission / DOHC fitment. 32mm hose diameter. 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.
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
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.