Cylinder Heads

Cometic Gen V LT 6-Bolt 4.150 Bore MLx Head Gasket C15704-052, Left Side Gen V LT 6-Bolt 4.150" Bore. 0.052" Compressed Thickness. Works with 1/2" Studs. MLx Gaskets utilize an integrated "stopper" layer for combustion chamber sealing and improved...

Cometic Gen V LT 6-Bolt 4.150 Bore MLx Head Gasket C15703-052, Right Side Gen V LT 6-Bolt 4.150" Bore. 0.052" Compressed Thickness, Works with 1/2" Studs MLx Gaskets utilize an integrated "stopper" layer for combustion chamber sealing and improved...

ARP 2000 Pro Series GM LS Thread Repair Head Stud Kit 234-4348 - 2004-Up  ARP has released an LS stud that’s 1/2" in the block and 7/16" above for helping save the blocks with damaged threads. These are made from 2000 series material and call...

LSXceleration Inconel 8mm x 1.600 LS Exhaust Valves 15-31570-8 Inconel LS Valve 1.570" Head x 8mm Stem x 4.915" OAL x 0.160" Tip Features: Hardened Stem Tip Ideal for Extreme Duty and Turbo Applications Chrome Plated Stem Fully Machined...

LSXceleration Inconel 8mm x 1.550 LS Exhaust Valves 15-31550-8 Inconel LS Valve 1.550" Head x 8mm Stem x 4.915" OAL x 0.160" Tip Features: Hardened Stem Tip Ideal for Extreme Duty and Turbo Applications Chrome Plated Stem Fully Machined...

LSXceleration Inconel 8mm x 1.570 LS Exhaust Valve 15-31570-1 Inconel LS Valve 1.570" Head x 8mm Stem x 4.915" OAL x 0.160" Tip Features: Hardened Stem Tip Ideal for Extreme Duty and Turbo Applications Chrome Plated Stem Fully Machined...

LSXceleration Inconel 8mm x 1.550 LS Exhaust Valve 15-31550-1 Inconel LS Valve 1.550" Head x 8mm Stem x 4.915" OAL x 0.160" Tip Features: Hardened Stem Tip Ideal for Extreme Duty and Turbo Applications Chrome Plated Stem Fully Machined...

Manley Extreme Duty 8mm x 1.560 L83 5.3L Exhaust Valves Stainless 12363-8 EXTREME DUTY SERIES Top Fuel, Funny Car and Marine Engine Exhaust Valves More Hot Hardness and High Temperature Strength than any competitive offerings Chrome Stems and Hard...

Manley Severe Duty 8mm x 1.930 L83 5.3L Intake Valves Stainless 12358-8 The Severe Duty® series of valves is the Manley signature in the performance and racing industry. Exhaust material XH-428 and intake material NK-844 is offered by no competitor...

Manley Severe Duty 8mm x 1.560 L83 5.3L Exhaust Valves Stainless 12361-8 The Severe Duty® series of valves is the Manley signature in the performance and racing industry. Exhaust material XH-428 and intake material NK-844 is offered by no competitor...

Manley Race Series 8mm x 1.930 L83 5.3L Intake Valves Stainless 12356-8 Manley is known as one of the leading manufacturers of Racing Valves in the world. Manley Racer Series Stainless Steel Valves were engineered for Street Performance and Racing...

Manley Race Series 8mm x 1.560 L83 5.3L Exhaust Valves Stainless 12359-8 Manley is known as one of the leading manufacturers of Racing Valves in the world. Manley Racer Series Stainless Steel Valves were engineered for Street Performance and Racing...