Description Stock Cylinder Head Bolts for 2001-2016 GM 6.6L Duramax Made to meet OEM tensile strength and quality as well as hold up to factory torque settings. Two (2) sets required for a complete engine repair. Qty: 18 Size: 12mm X 1.5mm X 121mm Fits: LB7, LLY, LBZ, LMM, LML, and LGH 2001-2016 6.6L / 402 OHV V8 32V Duramax 4.055″ Bore 2011-2016 Year Model Fitment Note: 2011-2016 Duramax engines will also require 4 secondary head bolts per side which are not included in this kit. (GM # 98065558) Reference # GS33504 / HB226 / 11610681
