Cylinder Head Bolts (20) Land Rover Defender & Range Rover 5.0L V8 Supercharged / Naturally Aspirated AJ133 LR026143

Complete set of 20 cylinder head bolts for the 5.0L Supercharged and Naturally Aspirated V8 AJ133 engine. These torque-to-yield (TTY) bolts are designed to deliver precise clamping force between the cylinder head and block under high heat and combustion pressure. Because TTY bolts permanently stretch during torque-angle installation, they should not be reused. Proper clamping load is critical to maintaining head gasket seal and preventing combustion or coolant leakage.