HKS Oil Cooler Kit Black - Honda Civic Type R FL5

HKS Oil Cooler Kit – Honda Civic Type R FL5

Take control of oil temperatures and unlock the full potential of your FL5 Civic Type R with the HKS Oil Cooler Kit. Developed specifically for the latest K20C-powered FL5, this comprehensive cooling solution is engineered to support sustained high-load driving, including continuous +R Mode use, spirited mountain driving, and demanding circuit sessions.

Through extensive in-house testing, HKS identified oil temperature management as one of the key limitations during prolonged performance driving. Drawing on years of motorsport and circuit development experience, HKS created a dedicated FL5 oil cooling system that effectively suppresses oil temperature rise while maintaining overall cooling efficiency, factory aerodynamics, and vehicle balance.

Purpose-Built for the FL5

Unlike traditional front-mounted oil cooler setups that can restrict airflow to the radiator, the HKS Oil Cooler Kit positions the 9-stage oil cooler core inside the left fender. This strategic placement allows efficient oil cooling without negatively impacting engine coolant temperatures or air conditioning performance.

To maximise cooling effectiveness, HKS developed a large FL5-specific air duct and dedicated air guide system that actively channels fresh air directly to the oil cooler core. Extensive airflow testing also ensured heated air is discharged efficiently, reducing turbulence and maintaining consistent cooling performance.

The result is a highly refined cooling package capable of handling extended high-speed and circuit driving while helping maintain stable oil and water temperatures.

Proven Performance

HKS testing demonstrated significant improvements compared to the factory oil cooler system:

• Approximately 15°C reduction in oil temperature
• Oil temperatures stabilised around 125°C in 26°C ambient conditions
• Factory system exceeded 140°C without stabilising
• Water temperatures reduced by approximately 3–5°C
• Improved thermal stability during continuous high-load driving

Key Features

• FL5-specific oil cooling solution developed by HKS
• Fender-mounted 9-stage oil cooler core
• Large dedicated air duct and airflow guide
• Efficient hot-air discharge design
• Thermostat-equipped system for controlled oil temperature management
• Maintains radiator efficiency by avoiding frontal airflow obstruction
• Outlet plate protects the core from stones and road debris
• Suitable for street, spirited driving, and circuit use

Kit Contents

• Oil cooler core
• Resin air duct (unpainted)
• Air intake duct
• Outlet plate
• Mounting brackets
• #10 oil hoses
• Thermostat housing
• HKS oil filter
• Installation hardware

Optional Upgrade

• HKS Dry Carbon Air Duct
• Clear-coated finish
• Integrated metal mesh
• Premium motorsport appearance

Vehicle Compatibility

Honda Civic Type R FL5
K20C Turbocharged Engine
2022+ Models

Technical Specifications

• Core Size: 200 × 122.5 × 48mm
• Core Type: 9-Stage
• Core Location: Left Fender
• Hose Size: #10
• Air Guide Material: Resin (standard)
• Optional Air Guide: Dry Carbon
• HKS Part Number: 15004-AH105

Installation Notes

• Front bumper removal required
• Minor drilling/modification of bumper and splash shield required
• Approximate installation time: 6 hours

Recommended Maintenance Products

• HKS Super Zero Racing Oil 0W-20
• HKS Super Oil Premium 0W-20
• HKS Oil Filter Type 1

Whether you're chasing lap times or simply want greater thermal stability during spirited driving, the HKS Oil Cooler Kit delivers the cooling performance required to keep your FL5 performing at its best when temperatures rise.