Koyo HH Series Aluminum Performance Radiator (1984-95 4Runner/Pickup)
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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 1984–1995 Toyota 4Runner & 1984–1995 Toyota Pickup
Overview
The Koyorad HH Series 48mm All Aluminum Performance Radiator is a high-capacity direct-fit cooling upgrade designed for 1984–1995 Toyota 4Runner and 1984–1995 Toyota Pickup models equipped with the 22R or 22RE engine and manual transmission. Engineered as a performance replacement for the factory radiator, this radiator delivers significantly improved cooling efficiency, increased durability, and factory-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 under demanding street, towing, off-road, and high-temperature driving conditions.
Important Fitment Notes:
- Designed for 22R or 22RE-equipped vehicles only
- Not compatible with 22RET turbocharged models
- Designed specifically for manual transmission vehicles
- Does not include an integrated automatic transmission cooler
Automatic transmission vehicles may still use this radiator when paired with:
- An external transmission cooler
- A standalone transmission cooling system
High-Efficiency Cooling Performance
The Koyorad HH Series radiator is engineered to improve cooling stability and maintain lower operating 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 towing and off-road use
- Stable engine temperatures under heavy load
- Enhanced cooling efficiency for modified and stock vehicles
- Improved reliability in hot climates and slow-speed trail driving
This makes the HH Series radiator an excellent solution for daily drivers, overland vehicles, trail rigs, and performance-oriented 22RE builds.
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 OEM-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 increased 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
- Overland and off-road builds
- Towing applications
- Hot climate operation
- Performance-oriented 22RE builds
- OEM radiator replacement upgrades
Vehicle Compatibility
1984–1989 Toyota 1st Gen 4Runner
- 22R / 22RE Engine
- Manual Transmission Only
- 2WD and 4WD Compatible
1984–1988 Toyota 2nd Gen Toyota Pickup
- 22R / 22RE Engine
- Manual Transmission Only
- 2WD and 4WD Compatible
1990–1995 Toyota 2nd Gen 4Runner
- 22R / 22RE Engine
- Manual Transmission Only
- 2WD and 4WD Compatible
1989–1995 Toyota 3rd Gen Toyota Pickup
- 22R / 22RE Engine
- Manual Transmission Only
- 2WD and 4WD Compatible
Exclusions
- Not compatible with 22RET turbocharged models
What Is Included
- Koyorad HH Series 48mm all-aluminum radiator
- Pre-installed threaded plug for 1/8-inch NPT accessory fitting
