Cylinder Heads

Dart Pro 1 LS7 Gen III Aluminum Cylinder Head 11061183 - 285cc CNC Rectangle Port, Assembled Recommended for engines with 4.125” bore or larger. Maximum competition, comp/modified drag racing, circle track, and heavy duty applications. Dart’s...

Dart Pro 1 LS7 Gen III Aluminum Cylinder Head 11061080 - 285cc CNC Rectangle Port, Bare Recommended for engines with 4.125” bore or larger. Maximum competition, comp/modified drag racing, circle track, and heavy duty applications. Dart’s new...

LSXceleration GM LS9 MLS 7-Layer Head Gasket 15-22033 4.100" bore x .053" thickness x 7-layer MLS. Made in Germany.    

Stock Replacement GM LS 1.590 Exhaust Valve 15-1590  

Stock Replacement GM LS 2.165 Intake Valve   

Chevrolet Performance Gen V LT1/LT4 MLS Head Gasket 12654622 4.0944" bore x .053" thickness x 7-layer MLS See our 14-54622 for same OEM quality!    

Holley LS Steam Tube Kit 26-551 Steam Vent Adapters & kits. They are designed to eliminate trapped air and steam from your engine to prevent hot spots or overheating. The complete kits are available to plumb your LS engine and include the...

Chevrolet Performance GM LS9 MLSHead Gaskets 12622033 **For the same quality at a better price, see our head gasket # 15-22033. 4.100" bore x .053" thickness x 7-layer MLS    

Mahle Performance LS MLS Head Gasket 55043 - 4.100 Bore .051 Thickness 4.100" bore x .051" thickness MAHLE performance MLS head gaskets are comprised of 3 stainless steel layers. Sealing beads surround the combustion chamber and coolant passages...

Mahle Performance LS MLS Head Gasket 55041 - 3.910 Bore 3.910" bore x .051" thickness MAHLE performance MLS head gaskets are comprised of 3 stainless steel layers. Sealing beads surround the combustion chamber and coolant passages emphasizing clamp...

Cometic LS7 4.150 Bore MLS Head Gasket C5889-051 LS7 4.150" Bore. 0.051" Compressed Thickness

Chevrolet Performance LS MLS Head Gasket Set 12498544 - 5.3L, 5.7L ***For the same quality at a better price see our head gasket set  # 14-98544. Multi-layer steel (MLS) cylinder head gaskets. Fits: 4.8L Vin Code (C) 5.3L Vin Codes (0, 3, B, J,...