Time will come that your head gasket will leak or blow. The cylinder head bolts hold the cylinder head and cylinder head gasket in place and ensure that the cylinder head will continue to hold up despite the tremendous amounts of pressure in the combustion chamber. Therefore the cylinder head bolts, and cylinder head gasket are an important part of your engine. They should always be in perfect condition and should be maintained properly.
So, if you notice that this part is showing signs of excessive wear, have them replaced immediately. Be sure to have your engine gaskets, and head bolts replace with aftermarket replacement head gasket bolts set as soon as it starts to give you trouble. The valley pan gasket in this does NOT fit on engines with Active Fuel Management A. These engines have two different designs for the head bolts. 1st design head bolts have 16 Long Bolts: 150mm, 4 Short Bolts: 100mm, 10 Small Bolts: 45mm.
2nd design head bolts have 20 Long Bolts: 100mm, 10 Small Bolts: 45mm. This kit ONLY FITS engine with 2ND DESIGN HEAD BOLTS (20 long bolts: 100mm, 10 small bolts: 46mm).Fit for LS1, LS2, LS3, LS6, LS7, LS9 LSX Engines. RPM Range: 2200 to 5400 RPM. Not compatible with Active Fuel Management (AFM). Automatic's will perform best with a 2,600-2,800 Stall Converter. 560 Lift Beehive Valve Springs!! Works with stock retainers & locks. Valve Lifter Set: 16pcs HL-124 Valve Lifters. Chevy LS Pushrods 7.400" 5/16".
Engine:4.8, 5.3, 6.0, LQ4, LQ9. Notes: Not for use with AFM/DOD. Cam Camshaft For Chevy x1. Bee Hive Valve Springs x16. Multiple Layers Steel (MLS) Head Gasket.
Intake Manifold Gasket Metal Upgraded. 30 Cylinder Head Bolts (20 Long Bolts: 100mm, 10 Small Bolts: 45mm). (except weekends & official holidays). We will be very honored to provide you with quality service. We will try our best to resolve any kind of issue.