HKS Oil Cooler Kit | 23+ Civic Type R FL5

Fits:

• 2023+ Honda Civic Type R FL5

Note: Requires front bumper and splash shield modification for duct install/drilling. Estimated install time is ~6 hours. Plan for ~0.5L of additional engine oil due to added system capacity. Choose Plastic or Dry Carbon (clear-coated, metal mesh) air duct.

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The FL5 Type R is a serious platform, but under sustained high-load driving, oil temps can climb quickly. The HKS Oil Cooler Kit is engineered specifically for the FL5 to deliver maximum thermal management with an airflow package that feeds fresh air directly to the core and evacuates heat efficiently — helping your Type R hold consistent performance lap after lap.

In HKS testing, the kit delivered roughly a 15°C reduction in oil temperature versus stock — oil temps stayed around 125°C at 26°C ambient during continuous high-load driving, while the stock setup exceeded 140°C without stabilizing. Locating the core in the left front wheel well (to avoid blocking radiator airflow) also helped coolant temps, reducing them by roughly 3-5°C. FL5-specific wind tunnel and aero development led to a dedicated large front duct and air guide for increased fresh airflow to the core, plus optimized hot-air discharge after the core.

Features

• Core location: left front wheel well area, optimized for thermal efficiency without compromising radiator airflow
• Hose size: #10
• Core type/size: S-type core, 200 x 122.5 x 48mm
• Core protector/outlet plate included to help shield against road debris and rock damage
• Kit includes: oil cooler core, air duct + air intake duct, core protector, mounting brackets, #10 oil hoses, thermostat housing, oil filter, and fittings/hardware