This listing is for Main cap Bolts set Plus Harmonic Balancer Bolt compatible replacements for 2004-2013 GM 4.8L, 5.3L 5.7L & 6.0L LS1 & LS2 Engines. Includes 10 inner main bolts(M10 X 2 X 102.5) and 10 outer main bolts for Windage tray (M10 X 2 X 23 Bottom) ( M8 X 1.25 X 113.5 top) and 10 Main Cap side bolts( M8 X 1.25 X 24) PLUS a replacement harmonic Balancer bolt. These bolts are from the same supplier to GM. Part # EHC-1007S + LS7840.