Cylinder Heads

LSXceleration Stainless Steel 8mm x 2.165 LS Intake Valve +0.500 Long  Stainless Steel LS Valves 2.165" Head x 8mm Stem x 5.450" OAL x 0.290" Tip Features: Hardened Stem Tip Chrome Plated Stem Fully Machined Surface Swirl Polished Undercut...

GM LS Head Studs 8740 Material - 1997-2003, 12-Point These Head Studs are made of 8740 (190,000 psi tensile strength) material and utilize a 12-point head. Suggested use in OEM replacement, street, non boosted applications.  Recommended...

Cometic LSX 4.150 Bore MLS Head Gasket w/SEG Rings, Left Side C15532-051 LS 4.150" Bore. 0.051" Compressed Thickness w/ SEG (Spring Energized Gasket) Rings, 6 Bolt Kit, LHS Extreme Sealing for High Horsepower Forced Induction Applications  The...

Cometic LSX 4.150 Bore MLS Head Gasket w/SEG Rings, Right Side C15531-051 LS 4.150" Bore. 0.051" Compressed Thickness w/ SEG (Spring Energized Gasket) Rings, 6 Bolt Kit, RHS   Extreme Sealing for High Horsepower Forced Induction Applications ...

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

Chevrolet Performance Steam Crossover Bolt 11588714 6mm x 1.0 x 1.181" UHL

Chevrolet Performance Coolant Air Bleed Plug 12602540

LSXceleration Stainless Steel 8mm x 2.000 LS Intake Valve Set 15-22000-8 Stainless Steel LS Valves 2.165" Head x 8mm Stem x 4.870" OAL x 0.160" Tip x 45 degree seat angle Features: Hardened Stem Tip Chrome Plated Stem Fully Machined Surface Swirl...

LSXceleration Stainless Steel 8mm x 2.165 LS Intake Valve 15-22165-1 Stainless Steel LS Valves 2.165" Head x 8mm Stem x 4.870" OAL x 0.160" Tip Features: Hardened Stem Tip Chrome Plated Stem Fully Machined Surface Swirl Polished Undercut...

Cometic Gen V LT1/4 4.100 Bore MLx Head Gasket C5038-028 Gen V LT1/LT4 4.100" Bore. 0.028" Compressed Thickness MLx Gaskets utilize an integrated "stopper" layer for combustion chamber sealing and improved clamp load around the cylinder without...

LSXceleration OEM Replacement Valve Guide 15-3053 Replacement valve guide. Intake or Exhaust; 2.115 OAL. 0.3154 I.D. 0.500 O.D.  

LSXceleration Head Bolt Kit for GM LS '97-'03 (12498545) One Kit Services Complete Engine Torque Procedure for GM LS Head Bolts #158545-KIT 1. Tighten 1 thru 10 to 22Ft-Lbs (30NM) in sequence 2. Tighten 1 thru 10 using the Torque Angle Method to...