AE86 Koyo HH Series 4AGE Aluminum Performance Radiator (1983-87 Corolla)
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I’m really pleased to be able to buy new parts for my truck instead of used
Perfect fit! Great product!
Looks as good as OEM.
Great cup holder! Fit, form and function are perfect.
Killer product, these exceeded all expectations. I’m super happy with the results
I’m very happy with the results. Installation is straightforward. Awesome communication too
Super nice quality. Looks just like the original. Makes the interior look complete.
The badges are DEFINITELY high quality. They come in a plastic wrapper inside the cardboard envelope so they’re not going to get scratched otw to you. I thought these were a great value considering people are selling stickers to go over your old badges for $30 and you can definitely tell they’re 2D. I would buy again and a third/fourth time.
Toyota H pattern shifter sticker was as described and shipped fast. Received in only a few days, A+ .
A++ . Good quality parts, Excellent condition, Packed nice and neatly. Arrived as described. Good Value and appearance. Fast, easy to work with, Good quality product and very fast shipping. Would do business again.
Mid Panels fit perfectly, as advertised. Easy installation and look great. Buy with confidence. This company is great! If you have ANY questions or concerns just hit the “Chat” icon and they will respond promptly. They make hard to find parts and their pricing is very fair. You won’t find better products for the money! I will be buying more items soon!!
Tailgate panel fit perfectly. As advertised. Best 1st Gen parts out there. Buy with confidence. Great product at a fair price ! As good or better than OEM!
Looks great works even better .
Koyo HH Series Aluminum Performance Radiator
For 1983–1987 Toyota Corolla AE86 Trueno & Levin Equipped with 4AGE
Overview
The Koyorad HH Series 48mm All Aluminum Performance Radiator is a high-capacity direct-fit cooling upgrade engineered for 1983–1987 Toyota Corolla AE86 Trueno and Levin models equipped with the 4AGE engine and manual transmission.
Designed as a performance replacement for the factory radiator, this upgraded cooling system delivers significantly improved heat dissipation, increased durability, and OEM-style fitment without requiring modifications.
Built around Koyorad’s advanced 48mm “HH” Hyper Core, this radiator utilizes ultra high fin density and precision aluminum construction to maximize heat transfer during spirited street driving, track use, drifting, canyon driving, and hot climate operation.
Important Fitment Notes
- Designed for 4AGE-equipped AE86 models only
- Not compatible with 4AC-equipped vehicles
- Designed specifically for manual transmission vehicles
- Direct-fit for AE86 Trueno and Levin chassis
High-Efficiency Cooling Performance
The Koyorad HH Series radiator is engineered to improve thermal stability and maintain lower coolant temperatures during demanding driving conditions.
Performance benefits include:
- Increased cooling capacity compared to OEM radiators
- Ultra high fin density for maximum heat transfer
- Improved resistance to heat soak during aggressive driving
- Stable engine temperatures under sustained high RPM operation
- Enhanced cooling efficiency for stock and modified 4AGE engines
- Improved reliability in hot climates and motorsport environments
This makes the HH Series radiator an excellent solution for street cars, drift builds, track cars, and period-correct AE86 restorations.
Advanced 48mm Hyper Core Design
At the center of the radiator is Koyorad’s proprietary 48mm “HH” Hyper Core, engineered to maximize airflow efficiency and cooling performance.
Core features include:
- 48mm thick all-aluminum Hyper Core
- Ultra high-density cooling fins
- Precision tube and fin alignment
- Optimized coolant flow characteristics
- Increased heat dissipation surface area
The larger core design significantly improves thermal efficiency while maintaining factory-style fitment.
Premium All Aluminum Construction
Koyorad radiators are manufactured using premium aluminum materials and precision assembly techniques for long-term durability and reliability.
Construction features include:
- Full aluminum radiator construction
- Hand-assembled radiator core
- Nocolok-R brazing process
- Hand TIG-welded aluminum tanks
- Billet aluminum filler neck
- OE-specific mounting locations
Unlike aging factory radiators that can crack or fail over time, Koyorad’s all-aluminum construction is engineered for improved durability and long service life.
Direct-Fit Installation
Each Koyorad radiator is vehicle-specific and engineered for straightforward installation using factory mounting locations.
Installation features include:
- Direct-fit replacement for OEM radiator
- Uses factory mounting points
- No cutting or modifications required
- Compatible with factory cooling fans and shrouds
- Quick bolt-in installation
An integrated 1/8-inch NPT female accessory fitting is also included for aftermarket coolant temperature sensors and gauges. A threaded plug is supplied pre-installed.
Additional Features
- Koyorad “HH” Series 48mm Hyper Core
- Billet aluminum filler neck
- Integrated 1/8-inch NPT accessory port
- Precision tube and fin alignment
- Designed for improved long-term cooling reliability
Ideal Applications
- Daily driving
- Track day builds
- Drift builds
- Canyon driving
- Modified 4AGE vehicles
- Hot climate operation
- OEM radiator replacement upgrades
- Period-correct AE86 restorations
Vehicle Compatibility
1983–1987 Toyota Corolla AE86 Trueno
- 4AGE Engine
- Manual Transmission Only
1983–1987 Toyota Corolla AE86 Levin
- 4AGE Engine
- Manual Transmission Only
Exclusions
- Not compatible with 4AC-equipped models
- Not compatible with automatic transmission vehicles
What Is Included
- Koyorad HH Series 48mm all-aluminum radiator
- Pre-installed threaded plug for 1/8-inch NPT accessory fitting
