The Triumph T1151105 Cylinder Head Bolt is an OEM M12 x 110 mm Torx T55 fastener that secures the cylinder head to the engine block in Triumph Thunderbird engines. Built as a high-strength automotive-grade fastener, it provides the clamping force required for engine rebuilds, cylinder head service, and OEM replacement. Commonly used on Triumph Thunderbird 1600, 1700, and Thunderbird LT applications (application dependent), it installs on the engine cylinder head assembly to ensure proper cylinder head retention during maintenance and repair.
