Product Overview The Cylinder Head Bolt LR026143 is a critical engine fastener engineered for for Land Rover and for Jaguar vehicles equipped with 3.0L V6 and 5.0L V8 petrol engines (AJ126 / AJ133) . Also known as a cylinder head bolt set, this high-tensile M11x1.5x178mm fastener secures the cylinder head to the engine block, maintaining proper clamping force under extreme pressure and temperature conditions . AJ812892 is the Jaguar equivalent part number . Key Features High