Pro LS Valve Springs, LS6 Style, 0.550 Max Lift, Single Beehive, 1.270 in. O.D., 375 lbs./in. Spring Rate, 1.800 in. Installed Height, Set of 16

Part Number: SUM-174002

4.8 out of 5 stars ( 30 )

Estimated Ship Date: Monday 11/9/2026 if shipped by air

Pro LS Valve Springs, Drop in, 0.600 Max Lift, Single Beehive, 1.290 in. O.D., 310 lbs./in. Spring Rate, 1.800 in. Installed Height, Set of 16

Part Number: SUM-174004

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 11/9/2026 if shipped by air

• Free Shipping

Valve Spring Upgrade Kit, 1.300 OD Dual Springs, Retainers/Locks, Seals, All GM LS LS1, LS2, LS3, LS7, LSA, LS9, LQ4, LQ9, L92, L76, LY6

Part Number: SME-174003

4.0 out of 5 stars ( 17 )

Estimated Ship Date: Monday 11/9/2026 if shipped by air

• Free Shipping

Valve Seals, Positive Stop, Viton® Fluoroelastomer, 8mm Stem, 0.500 in. Guide, Set of 16, LS1 hat style with single spring locator

Part Number: SME-143008

4.75 out of 5 stars ( 12 )

Estimated Ship Date: Monday 11/9/2026 if shipped by air

Valve Locks, Stamped Steel, 7 Degree, 8mm Stem, 1-Groove, Commonly used with LS Gen III/IV and Gen. V LT stock retainers, Set of 32

Part Number: SME-143009

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 11/9/2026 if shipped by air

Engine Assembly Lubricant, 4 oz., Each

Part Number: SUM-LUBE4OZ

4.43 out of 5 stars ( 7 )

Cannot be shipped Internationally if shipped by air

• Restricted

Camshaft Assembly and Break In Lubricant, Extreme Pressure, Molybdenum Disulfiide, 0.625 oz. Packet, Each

Part Number: SUM-CAMLUBE625

5.0 out of 5 stars ( 8 )

Cannot be shipped Internationally if shipped by air

• Restricted