MRC Racing Components Heater Core Thermostat Plug Kit K20 K24 Swap

Clean up your engine bay and eliminate unnecessary weight with the MRC Racing Components Heater Core Thermostat Plug Kit. Designed for K20 and K24 engine swap applications, this kit allows you to delete the heater hoses that run from the engine block and cylinder head to the heater core — removing clutter, reducing coolant volume, and giving your swap build a cleaner, more purpose-built appearance.

If you are building a dedicated track car, race car, or stripped street build where the heater core is no longer needed, this plug kit is the clean, leak-free solution. No more capping hoses with bolts or zip-tying loose lines out of the way.

MRC Racing Heater Core Delete Kit Features

• Purpose-Built for K20 and K24 Swaps — Designed specifically for K-series engine applications
• Deletes Heater Hoses — Removes hoses from the engine block and cylinder head to the heater core
• Reduces Weight and Clutter — Cleaner engine bay with fewer hoses and less coolant volume
• Leak-Free Seal — Proper plug fitment ensures no coolant leaks
• Direct Bolt-On — No modification or fabrication required

Fitment / Applications

• K20 engine swaps
• K24 engine swaps
• K-series swap builds in any chassis (Civic, CRX, Integra, etc.)

Notes

• This kit deletes your heater core functionality — only recommended for race cars, track builds, or vehicles where cabin heat is not needed
• Ensure your cooling system is properly bled after installation

Pro Tip: Deleting the heater core on a race build does more than just clean up the engine bay. You are also reducing the total coolant volume in the system, which means less weight and faster coolant warm-up to operating temperature. Pair this with a proper thermostat and your cooling system runs more efficiently.