HKS 2023+ Honda Civic Type R FL5 Black S Type Oil Cooler Kit | 15004-AH105

HKS Oil Cooler Kit Black – 2023–Present Honda Civic Type R (FL5) | 15004-AH105

The HKS Oil Cooler Kit (Black) is designed specifically for the 2023–present Civic Type R (FL5) to control oil temperatures during sustained high-load driving (track days, +R mode, long pulls, and hot climates). HKS developed this kit around the FL5 platform with a dedicated ducting strategy that feeds fresh air directly to the cooler core and then evacuates it efficiently—helping maintain stable oil temps and consistent performance.

Key Features

• Application: 2023–Present Honda Civic Type R (FL5) | Engine: K20C
• HKS Part Number: 15004-AH105
• Core Style: S-Type
• Core Size / Rows: 200 x 122.5 x 48mm / 9-row
• Core Location: Inside right fender area
• Hose Size: #10 (stainless braided for durability)
• Thermostat: Opens at 70°C (±3), fully open at 80°C (±3)
• Safety Feature: Thermostat relief/bypass helps protect lines & fittings if flow is restricted
• Protection Included: Core protector to help guard against road debris

What’s Included

• Oil cooler core
• Resin-molded air ducts (ducting components included)
• Air intake duct
• Core protector
• Mounting brackets & hardware
• #10 oil lines & fittings
• Thermostat housing
• Oil filter

Why Upgrade?

• Helps reduce oil temperature spikes during repeated hard braking and acceleration
• Improves thermal stability for consistent power and protection under sustained load
• Purpose-built ducting approach to maximize airflow to the cooler core

Install Notes

• Modification required: bumper and splash shield trimming/modification is required to route/install ducts
• Estimated install time: ~6 hours (varies by experience & tools)
• Oil capacity note: plan for approximately +0.5L additional oil when installing the oil cooler

Optional Add-On

• Dry Carbon Air Duct (Optional): replaces the included duct — HKS 15999-AH001

Note: We recommend verifying fitment, planning for an oil change during installation, and performing an alignment/inspection if your front undertray or related components are removed during the install.