Performance Koyo Radiator, Honda Civic, EG/EK (DOHC), 91-00, 48mm, (KH080300)

Koyo radiator Honda Civic B‑Series NZ — Built for Kiwi Conditions
The Koyo HH Series 48mm Radiator (KH080300) is the ultimate cooling upgrade for B-Series EG/EK Civics. Featuring a high-density core with ultra-fine fins, this all-aluminium radiator is purpose-built for New Zealand drivers who push their Hondas on the street, track, or backroads. It’s a precise OE-fit replacement—no mods, no fuss.

Hand-built in Japan, each unit is Nocolok brazed and TIG welded for premium strength and corrosion resistance. The billet filler neck offers superior sealing, while the added 1/8" NPT port (with plug) makes it easy to fit an aftermarket temp sensor. Whether you're carving through the Kaimais or stuck in Auckland traffic, your engine stays cool as.

Compatible with all B-Series DOHC Civics from 1991–2000 (EG/EK), this Koyo radiator Honda Civic B-Series NZ is engineered to withstand Aotearoa’s tough driving conditions—heat, hills, and long-hauls included.

Features & Benefits

• 48mm HH Series Radiator Core – Ultra-dense fin layout for maximum heat transfer in NZ’s stop-start traffic and warm summer runs

• Nocolok Brazing Technology – Resists vibration, gravel impacts, and corrosion from coastal roads

• Billet Filler Neck – Precision-sealed, durable and leak-resistant—no worries on long drives

• OE-Specific Mounting – Fits like factory; mates with stock fan shrouds, hoses and mounts

• 1/8” NPT Accessory Port – Accepts aftermarket temp sensors (plug included)

• TIG-Welded by Hand – Strongest bond for alloy-to-alloy durability, crafted in Japan

• Radiator Hose Size – 32mm inlet/outlet for EG and EK DOHC models

Made for New Zealand Roads

Whether you’re hooning around Ruapuna, heading over the Remutakas, or cruising to your local cars and coffee meet, this Koyo radiator Honda Civic B‑Series NZ delivers consistent, high-performance cooling you can count on.

Technical Specifications

What’s Included

• 1 × Koyo HH Series 48mm Radiator (KH080300)

• 1 × 1/8” NPT Plug (installed)

• OE-style mounts for easy fitment

• Compatibility with factory hoses and fan shrouds
  (Radiator cap sold separately)

Customer Reviews

⭐⭐⭐⭐⭐
Jason T. — Dunedin, Otago

“Installed it on my EG hatch—temps stay low even after hammering it at Highlands. Quality welds and fit was bang on. Chur, Koyo!”

⭐⭐⭐⭐⭐
Aimee R. — Hamilton, Waikato

“No more overheating up the Bombays. Bolted right in, and looks mint too. Perfect for summer runs to the Coromandel.”