Our Unit 14 Performance M5X Heater Core Block Off Plate is designed to replace the factory heater hose outlet on the rear of the cylinder head with a machined 6061 billet aluminium plate, allowing you to simplify the cooling system or remove the heater core entirely.
Featuring a 1/8 NPT threaded port, this design gives you added flexibility to run a sensor, vent line, or use the included plug for a traditional block-off setup.
Ideal for simplified engine bays and custom cooling configurations, this upgrade provides a clean and functional solution without permanently limiting future options.
M5X Engine Fitment
Designed to suit M50, M52, S50 and S52 cylinder heads, mounting to the rear coolant outlet with supplied gasket and hardware.
 
 
Key Features
6061 billet aluminium
Integrated 1/8 NPT port
Allows sensor or vent options
Direct M5X fitment
 
 
Contents
1x Heater Core Block Off Plate
1x Gasket
Mounting Hardware
1x 1/8 NPT Plug