Koyorad HH Series 48mm Aluminum Radiator | Manual 22R / 22RE (1984-89 4Runner / 1984-95 Pickup)

Koyorad HH Series 48mm Aluminum Performance Radiator

For 1984–1989 Toyota 4Runner and 1984–1995 Toyota Pickup with naturally aspirated 22R / 22RE and manual transmission

Overview

The Koyorad HH Series 48mm Aluminum Performance Radiator is a high-capacity direct-fit cooling upgrade for Toyota 4Runner and Toyota Pickup applications equipped with the naturally aspirated 2.4L 22R or 22RE engine and manual transmission.

The same vehicle-specific radiator fits 1984–1989 1st Gen Toyota 4Runner 4WD as well as 1984–1995 Toyota Pickup 2WD and 4WD applications listed below. Built around Koyorad's 48mm HH Series Hyper Core, it provides increased coolant capacity and heat-transfer surface area for demanding street, off-road, towing, overland, and hot-climate use.

Key Features

• 48mm HH Series Hyper Core
• All-aluminum performance radiator construction
• Increased tube and fin density for improved heat transfer
• Designed for naturally aspirated 22R and 22RE engines
• Manual-transmission application
• Vehicle-specific direct-fit mounting
• Nocolok-R brazed radiator core
• Hand-welded aluminum tanks
• Billet aluminum filler neck
• Integrated 1/8-inch threaded accessory port
• Retains the factory fan shroud

48mm HH Series Hyper Core

The 48mm Hyper Core increases coolant volume and heat-transfer surface area while maintaining direct-fit vehicle mounting. Its high-density tube and fin arrangement is designed to transfer heat efficiently during sustained engine load, high ambient temperatures, towing, slow-speed trail driving, and other conditions that place additional demand on the cooling system.

Vehicle Fitment

All applications require: naturally aspirated 2.4L 22R / 22RE and manual transmission.

Toyota 4Runner

• 1984–1989 Toyota 4Runner – 1st Gen – 4WD

Toyota Pickup

• 1984–1988 Toyota Pickup – 2nd Gen – 2WD / 4WD
• 1989–1995 Toyota Pickup – 3rd Gen – 2WD / 4WD

Fitment Notes

• Naturally aspirated 22R and 22RE engines only.
• Manual transmission only.
• Does not fit 22R-TE turbocharged models.
• Does not fit V6 applications.
• Does not fit automatic-transmission applications.
• Does not include an integrated automatic-transmission oil cooler.
• Uses vehicle-specific factory radiator mounting locations.
• Factory fan shroud can be retained.
• Radiator cap is not included.

Product Specifications

Brand: Koyorad
Series: HH Series
Product Type: Performance Radiator
Core Type: Hyper Core
Core Thickness: 48 mm
Construction: All Aluminum
Engine: 2.4L 22R / 22RE
Transmission: Manual
Drivetrain: 4Runner – 4WD; Pickup – 2WD / 4WD
Core Construction: Nocolok-R Brazed
Tanks: Hand-Welded Aluminum
Filler Neck: Billet Aluminum
Accessory Port: 1/8-Inch Threaded Female Port
Installation: Vehicle-Specific / Direct Fit

Koyorad HH vs. CSF 3-Row All-Metal Radiator

Both are cooling upgrades for classic Toyota 4Runner and Pickup applications, but they use different construction methods and are best suited to different priorities.

Koyorad HH Series 48mm Aluminum Radiator

• All-aluminum construction with a 48 mm high-density core
• Lighter than a traditional copper/brass radiator
• Designed for naturally aspirated 22R / 22RE manual-transmission applications
• Does not include an integrated automatic-transmission cooler
• Designed to retain the factory fan shroud on supported applications
• Best suited to owners prioritizing lightweight construction and a performance-oriented cooling upgrade

CSF Heavy-Duty 3-Row All-Metal Radiator

• Traditional 3-row copper core with brass tanks
• Heavier than the Koyorad aluminum radiator
• Available in broader engine and transmission configurations depending on vehicle application
• Includes an integrated transmission cooler on applicable configurations
• Copper/brass construction can often be repaired, soldered, or recored by a qualified radiator shop
• Best suited to owners prioritizing heavy-duty cooling, broader application coverage, and long-term serviceability

Important: Do not compare these radiators by row count alone. The CSF uses a traditional three-row copper/brass core, while the Koyorad uses a thick 48 mm high-density aluminum core. They use different core technologies to increase cooling capacity.

For the matching CSF alternative, choose the vehicle-specific CSF 3-Row All-Metal Radiator listing for your 4Runner or Pickup application.

What's Included

• (1) Koyorad HH Series 48mm all-aluminum performance radiator
• (1) Pre-installed threaded accessory-port plug

Radiator cap is not included.