Cylinder Head Accessories

GM LS 2004-2014 Hex Head Bolt Kit HBS-002ERL Features & Benefits:  Material - Chromemoly Alloy Steel Yield Strength - 170,000 PSI Finish - Black Oxide Reduced Wrenching Size – Provides Extra Socket Clearance Choose Form...

LSXceleration GM Gen V 6.6L L8T MLS Head Gasket 14-88186 (Like GM 12688186) 4.0944" (104mm) bore x .0523" (1.33mm) thickness.    

Dart Stainless Steel GM LS 1.600 Exhaust Valve 21391600 Dart stainless steel valves are designed to withstand the pressures of high-lift roller cams and feature a head design that promotes high flow. They are constructed of high-strength stainless steel...

Cometic LS 3.910 Bore MLS Head Gasket C5475-040 LS 3.910" Bore. 0.040" Compressed Thickness MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel. The embossed outer layers of...

Cometic LS 4.040 Bore MLx Head Gasket C5505-066 LS 4.040" Bore. 0.066" Compressed Thickness MLx Gaskets utilize an integrated "stopper" layer for combustion chamber sealing and improved clamp load around the cylinder without increasing bore distortion...

Cometic LS 4.130 Bore MLS Head Gasket C5317-070 LS 4.130" Bore. 0.070" Compressed Thickness MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel. The embossed outer layers of...

Cometic Dart LS Next 4.200 Bore MLx Head Gasket C15362-040, Right Side Dart LS Next 4.200" Bore. 0.040" Compressed Thickness MLx Gaskets utilize an integrated "stopper" layer for combustion chamber sealing and improved clamp load around the cylinder...

Cometic Dart LS Next 4.200 Bore MLx Head Gasket C15363-040, Left Side Dart LS Next 4.200" Bore. 0.040" Compressed Thickness MLx Gaskets utilize an integrated "stopper" layer for combustion chamber sealing and improved clamp load around the cylinder...

MLS HEAD GASKETS – GM LS 6.0L, 6.2L *Fits VIN's K, Y 6.0L Engines Multi-layer steel (MLS) cylinder head gaskets.Increase torque and performance while decreasing oil consumption and emissions. The development goals in engine construction determine...

Cometic LS 3.910 Bore MLS Head Gasket C5475-030 LS 3.910" Bore. 0.030" Compressed Thickness MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel. The embossed outer layers of...

Cometic LS 4.060 Bore MLS Head Gasket C5751-075 LS 4.060" Bore. 0.075" Compressed Thickness MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel. The embossed outer layers of...

Chevrolet Performance Coolant Crossover Pipe 12694769 Front cylinder head steam bleed tube. Includes O-rings in the fittings that bolt to the heads.