Koyorad HH060642 Racing Radiator for 1986-1988 Mazda RX-7 FC 1.3 L Rotary MT

Vehicle Fitment

• 1986-1988 Mazda RX-7 (FC, 1.3 L 13B Rotary - NA & Turbo, Manual Transmission)

Features

• All-aluminum HH Series radiator core for improved heat dissipation
• 48 mm thick Hyper core increases cooling capacity over stock
• High-density fin design promotes efficient thermal transfer
• Precision Nocolok™ brazed construction - corrosion resistance & durability
• Direct bolt-in fit with OEM mounting points - no cutting required
• Retains factory fan shroud and hose connections for simple install
• Billet aluminum filler neck for reliable sealing
• Integrated 1/8"-NPT accessory fitting for temperature sensor or gauge install

Specifications

• Part Number: HH060642
• Core Thickness: 48 mm Hyper core
• Material: All-aluminum (core & tanks)
• Compatible Engine: 1.3 L 13B Rotary (NA & Turbo II)
• Transmission: Manual Transmission (MT) only
• Fitment: Mazda RX-7 FC (1986-1988)
• Accessory Port: 1/8"-NPT threaded fitting (plug supplied)
• Mounting: Uses OEM brackets and hardware

Included Components

• 1x Koyorad HH060642 all-aluminum radiator assembly
• 1x Billet aluminum filler neck (installed)
• 1x 1/8"-NPT accessory port plug

Product Description

The **Koyorad HH060642 Racing Radiator** is a high-performance cooling upgrade engineered specifically for the **1986-1988 Mazda RX-7 FC** equipped with the **1.3 L Rotary engine** (both naturally aspirated and Turbo II) and manual transmission. Featuring a robust **48 mm thick all-aluminum HH Series "Hyper" core**, this radiator significantly increases cooling capacity and heat dissipation over the original factory radiator. Its high-density fins and precision Nocolok™ brazed construction improve thermal performance and long-term durability - ideal for spirited driving, track use, or hot weather conditions.

Designed as a direct bolt-in replacement, the HH060642 uses OEM mounting points and retains compatibility with the stock fan shroud and hose connections, making installation straightforward with no major modifications required. A billet aluminum filler neck and an integrated 1/8"-NPT accessory port allow optional installation of temperature sensors or gauges for performance monitoring. Whether you're refreshing an aging cooling system or upgrading for enhanced heat control, this radiator delivers dependable performance and reliability for classic Mazda RX-7 FC chassis vehicles.