Cylinder Head Accessories

LSXceleration Stainless Steel 8mm x 1.590 LS Exhaust Valve 15-21590-1 Stainless Steel LS Valves 1.590" Head x 8mm Stem x 4.915" OAL x 0.160" Tip x 45 degree valve seat angle Features: Hardened Stem Tip Chrome Plated Stem Fully Machined...

LSXceleration Stainless Steel 8mm x 1.590 LS Exhaust Valve Set 15-21590-8 Stainless Steel LS Valves 1.590" Head x 8mm Stem x 4.915" OAL x 0.160" Tip x 45 degree valve seat angle Features: Hardened Stem Tip Chrome Plated Stem Fully Machined...

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...

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...

LSXceleration LS3 Billet Rocker Arm Stand 15-LS3RS Rocker arm stand for LSXceleration LS3 cylinder heads. May be used on factory LS3 heads as well.  Features: 6061 aircraft grade aluminum Made in the USA       

LSXceleration Inconel 8mm x 1.600 LS Intake Valve +0.500 Long    Inconel LS Valve 1.600" Head x 8mm Stem x 5.450" OAL x 0.290" Tip Features: Hardened Stem Tip Ideal for Extreme Duty and Turbo Applications Chrome Plated Stem Fully...

LSXceleration Stainless Steel 8mm x 1.600 LS Intake Valve +0.500 Long   Stainless Steel LS Valves 1.600" Head x 8mm Stem x 5.450" OAL x 0.290" Tip Features: Hardened Stem Tip Chrome Plated Stem Fully Machined Surface Swirl...

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 LS 4.200 Bore MLS Head Gasket w/SEG Rings, C15542-051 LS 4.200" Bore. 0.051" Compressed Thickness w/ SEG (Spring Energized Gasket) Rings, 4 Bolt Kit   Extreme Sealing for High Horsepower Forced Induction Applications    The...

Cometic LS 4.150 Bore MLS Head Gasket w/SEG Rings, C15540-051 LS 4.150" Bore. 0.051" Compressed Thickness w/ SEG (Spring Energized Gasket) Rings, 4 Bolt Kit   Extreme Sealing for High Horsepower Forced Induction Applications    The...

Cometic LSX 4.200 Bore MLS Head Gasket w/SEG Rings, Left Side C15538-051 LSX 4.200" Bore. 0.051" Compressed Thickness w/ SEG (Spring Energized Gasket) Rings, 6 Bolt Kit, LHS Extreme Sealing for High Horsepower Forced Induction Applications  The...