Supplier Order code: BLTCH015. M6 x 105mm Cylinder Head Bolt. Secure your engine with this high-quality M6 x 105mm cylinder head bolt. Length: 105mm. Size: M6 x 105mm. Thread Size: M6. In the category of Engines and Engine Parts > Plugs, Bolts and Fixings > Cylinder Head Bolts/Studs.