CHEVROLET Chevy small block Gen III/IV (LS-based engines) Cylinder Heads

Cylinder Head Dowel Pin, Chevy, Small Block, LS Engines, Each

Part Number: NAL-12570326

4.83 out of 5 stars ( 18 )

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Cylinder Head, GenX® 255, CNC Competition Ported, Assembled, 69cc CNC Chambers, 450 Lb. Springs, GM LSX, Each

Part Number: TFS-32610002-C01

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Cylinder Head Dowel Pins, Stock Replacement, GM, Gen III/IV LS, Each

Part Number: BTC-BTR70326

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Cylinder Head, L92, Aluminum, Assembled, 70cc Chamber, Chevy, LS, Each

Part Number: NAL-12711770

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Cylinder Head Dowel Pins, Chevy, Small Block LS, LT, Set of 4

Part Number: ICB-551275

4.73 out of 5 stars ( 11 )

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Valve Seats, Ductile Iron, Exhaust, 1.680 in. Outside Diameter, Chevy, Small Block, LS1, Set of 8

Part Number: TFS-30600274

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Engine Coolant Plug Fastener, Bolt, Internal Allen Head, 27mm x 1.00 Thread Size, 17mm Allen Head Size, Chevy, Small Block LS, LT, Each

Part Number: NAL-11611351

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Valve Guide, Bronze, 0.505 in. o.d., Chevy, Ford, Each

Part Number: AFR-9056

5.0 out of 5 stars ( 3 )

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Valve Seats, Ductile Iron, Exhaust, 1.625 in. Outside Diameter, Chevy, Small Block, LS1, Set of 8

Part Number: TFS-30600272

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Cylinder Head, LS9, Assembled, CNC-Ported, 66.5cc Combustion Chamber, Aluminum, Natural Finish, 2.16 in. Intake Valve, Rectangular Intake Port, Each

Part Number: NAL-19433498

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Head Combo, GenX® Top-End, 580hp, 520 ft-lbs. Torque, GM, LS3, Square Port, Kit

Part Number: TFS-K326-580-520

3.75 out of 5 stars ( 4 )

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LS Cathedral Port/SBC/SBF 8mm Bronze Guide, .502" O.D., Set of 16

Part Number: AFR-9051-16

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Engine Coolan Plugs, Chevy, Small Block LS Gen III and Gen IV, Small Block LT Gen V, Each

Part Number: ICB-551282

5.0 out of 5 stars ( 1 )

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Engine Coolant Plug Fastener, Bolt, Internal Allen Head, 28mm x 1.25 Thread Size, Steel, Natural, Chevy, Small Block LS, Each

Part Number: NAL-12561663

5.0 out of 5 stars ( 5 )

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Cylinder Head, GenX® 235, Competition Ported, Assembled, 70cc CNC Chambers, Ti Retainers, 6-Bolt, GM LSX, Each

Part Number: TFS-3061T003-C03

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Valve Seats, Ductile Iron, Intake, 2.125 Outside Diameter, Chevy, Small Block, LS1, Set of 8

Part Number: TFS-30600271

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Valve Seat Inserts, Exhaust, Ductile Iron, 1.350 in. I.D., 1.650 in. O.D., Chevrolet, Ford, Each

Part Number: AFR-9069

5.0 out of 5 stars ( 1 )

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Valve Seat Inserts, Intake, Ductile Iron, 1.720 in. I.D., 2.132 in. O.D., Chevrolet, Ford, Each

Part Number: AFR-9059

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Head Bolt Kit

Part Number: PIO-851200

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Estimated Ship Date: Nov 17, 2025 if ordered today

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Valve Guide, Bronze, Chevy, Small Block, LS1, Each

Part Number: TFS-30600251-1

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Bolt, LS Engine Coolant Plug Fastener, 6mm x 1.0 Thread, Hex, Steel, Chevrolet, Pontiac, Each

Part Number: NAL-11588714

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Valve Seat, Ductile Iron, Exhaust, 1.625 in. Outside Diameter, Chevy, Small Block, LS1, Each

Part Number: TFS-30600272-1

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Valve Seat, Ductile Iron, Intake, 2.125 in. Outside Diameter, Chevy, Small Block, LS1, Each

Part Number: TFS-30600271-1

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Valve Seat, Ductile Iron, Exhaust, 1.680 in. Outside Diameter, Chevy, Small Block, LS1, Each

Part Number: TFS-30600274-1

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Cylinder Head, GenX® 220, Fast As Cast®, Assembled, 65cc CNC Chambers, GM LS2, Each

Part Number: TFS-30610002

4.0 out of 5 stars ( 1 )

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