CHEVROLET Chevy small block Gen III/IV (LS-based engines) Engines & Components

Pistons, Speed of Air, Dimpled Piston, 2618 Forged, 4.075 in. Bore, 4.000 in. Stroke, 6.125 in. Rod, +20.00cc Dish, PVD Rings, Chevy, 6.0L, 6.2L, Kit

Part Number: UEM-XA532-075K1

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Estimated Ship Date: Dec 12, 2025 if ordered today

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Pistons, Speed of Air, Dimpled, 2618 Forged, 4.075 in. Bore, 4.000 in. Stroke, 6.125 in. Rod, +20.00cc Dish, Piston Rings, Chevy, 6.0L, 6.2L, Kit

Part Number: UEM-XA532-075K2

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Estimated Ship Date: Dec 12, 2025 if ordered today

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Pistons, Speed of Air, Dimpled Piston, 2618 Forged, 4.080 in. Bore, 4.000 in. Stroke, 6.125 in. Rod, +20.00cc Dish, PVD Rings, Chevy, 6.0L, 6.2L, Kit

Part Number: UEM-XA532-080K1

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Estimated Ship Date: Dec 12, 2025 if ordered today

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Pistons, Speed of Air, Dimpled Piston, 4032 Forged, 4.000 in. Bore, 4.000 in. Stroke, 6.125 in. Rod, +4.00cc Flat Top, Piston Rings, Chevy, 6.0L, Kit

Part Number: UEM-XA552-STDK2

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Estimated Ship Date: Dec 12, 2025 if ordered today

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Cylinder Head, Pro 1 LS, Aluminum, Bare, 68cc Chamber, 250cc Intake Runner, Chevy, 5.7L LS1, 6.0L LS1, Each

Part Number: DRT-11071040

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Cylinder Head, Pro 1 LS, Aluminum, Assembled, 68cc Chamber, 250cc Intake Runner, Chevy, 5.7L LS1, 6.0L LS1, Each

Part Number: DRT-11071142

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Cylinder Heads, BR Series, Aluminum, Bare, Chevy, Pontiac, LSX Engines, Pair

Part Number: BRO-1170000

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Estimated Ship Date: Dec 10, 2025 if ordered today

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Cylinder Heads, BR 3, Aluminum, Bare, Chevy, Pontiac, LSX Engines, Pair

Part Number: BRO-1173000

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Estimated Ship Date: Dec 10, 2025 if ordered today

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Cylinder Head, Pro 1 LS, Aluminum, Assembled, 68cc Chamber, 280cc Intake Runner, Chevy, LSX, Beehive Springs

Part Number: DRT-11030152

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Cylinder Head, Pro 1 LS, Aluminum, Bare, 68cc Chamber, 280cc Intake Runner, Chevy, LSX, Dual Springs, Each

Part Number: DRT-11030153

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Cylinder Head, Pro 1 LS, Bare, Aluminum, Rectangle Port, Chevy, Each

Part Number: DRT-11061080

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Cylinder Head, Pro 1 LS, Bare, Aluminum, Rectangle Port, Jesel Rocker Arms, Chevrolet, Each

Part Number: DRT-11061080J

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Estimated Ship Date: Dec 29, 2025 if ordered today

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Cylinder Head, Black Label, 61cc Combustion Chamber, Bare, 2.080 in. Intake Valve, 1.570 in. Exhaust Valve, Chevy, LS3, Each

Part Number: MML-CHLSX600188

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Estimated Ship Date: Dec 19, 2025 if ordered today

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Cylinder Head, Black Label, 70cc Combustion Chamber, Bare, 2.165 in. Intake Valve, 1.600 in. Exhaust Valve, Chevy, LS3, Each

Part Number: MML-CHLSX600189

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Estimated Ship Date: Dec 19, 2025 if ordered today

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Cylinder Head, Black Label, 70cc Combustion Chamber, Bare, 2.250 in. Intake Valve, 1.600 in. Exhaust Valve, Chevy, LS3, Each

Part Number: MML-CHLSX600190

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Estimated Ship Date: Dec 19, 2025 if ordered today

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Cylinder Head, Black Label, 70cc Combustion Chamber, Bare, 2.165 in. Intake Valve, 1.600 in. Exhaust Valve, Chevy, LS7, Each

Part Number: MML-CHLSX600192

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Estimated Ship Date: Dec 19, 2025 if ordered today

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Cylinder Head, Black Label, 70cc Combustion Chamber, Bare, 2.250 in. Intake Valve, 1.600 in. Exhaust Valve, Chevy, LS7, Each

Part Number: MML-CHLSX600195

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Estimated Ship Date: Dec 19, 2025 if ordered today

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Cylinder Head, Black Label, 70cc Combustion Chamber, Bare, 2.165 in. Intake Valve, 1.600 in. Exhaust Valve, Chevy, LS, Each

Part Number: MML-CHLSX600185

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Estimated Ship Date: Dec 19, 2025 if ordered today

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Cylinder Head, Black Label, 70cc Combustion Chamber, Bare, 2.250 in. Intake Valve, 1.600 in. Exhaust Valve, Chevy, LS, Each

Part Number: MML-CHLSX600186

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Estimated Ship Date: Dec 19, 2025 if ordered today

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Cylinder Head, CNC, Victor 12 Degree, Aluminum, Bare, 69cc Chamber, 291cc Intake Runner, 6-Bolt Flange, Chevy, LS7, Each

Part Number: EDL-77678

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Estimated Ship Date: Nov 28, 2025 if ordered today

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Cylinder Head, GenX® 260, CNC Comp Port, Assy, 70cc CNC Chamber, 370 Springs, Ti Retain, 6-Bolt, GM LSX, Each

Part Number: TFS-3271T003-C01

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Estimated Ship Date: Jan 29, 2026 if ordered today

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Cylinder Head, GenX® 255, CNC Comp Port, Assembled, 69cc CNC Chamber, 370 Lb. Springs, Ti Retain, GM LSX, Each

Part Number: TFS-3261T001-C01

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 29, 2026 if ordered today

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Cylinder Head, GenX® 255, CNC Comp Port, Assy, 69cc CNC Chamber, 370 Springs, Ti Retain, 6-Bolt, GM LSX, Each

Part Number: TFS-3261T003-C01

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Jan 29, 2026 if ordered today

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Pro LS 4340 Piston and Rod Kit, 417 Cid., 4.080 bore, 4.000 stroke, 6.125 rod, 21cc dish, 9.9:1 @ 65cc, 9.5:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR4008021

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Estimated Ship Date: Tomorrow if ordered today

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