Engine Specifications:

• Block: 100% New ATK Block 1pc Seal
• Bore/Stroke: 4.000” x 3.750”
• Displacement: 377CI
• Crankshaft: Scat 4340 forged external balance rear of the crank/internal balance front of the crank
• Rods: Scat 4340 forged H beam with ARP 8740 bolts
• Pistons: 2618 Forged -5cc flat top
• Compression Ratios: 58cc = 11.9:1 / 64cc = 11.1:1 / 70cc = 10.3:1 (can vary due to deck height/gasket thickness)
• Rings: Plasmamoly
• Camshaft Bearings: Dura-Bond, installed and clocked to OEM position
• Freeze Plugs: Brass, installed and sealed
• Oil Galley Plugs: Installed and sealed
• Flexplate/Flywheel: External balance 168 tooth (with Scat kit)

Recommended Components:
• Balancer: Internal balance
• Head Gasket: .038” or per application

Engine Info:
• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N per application

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts.  ATK reserves the right to substitute parts used in engines if necessary.

The post ATK SP53NB 100% New CHEVY 377CI Stroker Forged -5cc Flat Top Pistons appeared first on ATK High Performance Engine.

Engine Specifications:

• Block: 100% New American Made Block 1pc Seal
• Bore/Stroke: 4.000” x 3.750”
• Displacement: 377CI
• Crankshaft: Scat 4340 forged external balance rear of the crank/internal balance front of the crank
• Rods: Scat 4340 forged H beam with ARP 8740 bolts
• Pistons: 2618 Forged -16cc dished with 2 valve reliefs
• Compression Ratios: 58cc = 10.4:1 / 64cc = 9.8:1 / 70cc = 9.2:1 (can vary due to deck height/gasket thickness)
• Rings: Plasmamoly
• Camshaft Bearings: Dura-Bond, installed and clocked to OEM position
• Freeze Plugs: Brass, installed and sealed
• Oil Galley Plugs: Installed and sealed
• Flexplate/Flywheel: External balance 168 tooth (with Scat kit)

Recommended Components:
• Balancer: Internal balance
• Head Gasket: .038” or per application

Engine Info:
• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N per application

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts.  ATK reserves the right to substitute parts used in engines if necessary.

The post ATK SP35NB 100% New CHEVY 377CI Stroker Forged -16cc Dished Pistons appeared first on ATK High Performance Engine.

Recommended Components:
• Balancer: Internal balance
• Flexplate/Flywheel: Internal balance
• Head Gasket: .038” or per application

Engine Info:
• Oil: 10W30 Conventional / Non Synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary.

The post ATK SP45 Chevy 598 Short Block Flat Top Pistons appeared first on ATK High Performance Engine.

Recommended Components:
• Balancer: Internal balance
• Flexplate/Flywheel: Internal balance
• Head Gasket: .038” or per application

Engine Info:
• Oil: 10W30 Conventional / Non Synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary.

The post ATK SP44 Chevy 540CI Short Block -10cc Dome Pistons appeared first on ATK High Performance Engine.

Recommended Components:
• Balancer: Internal balance
• Flexplate/Flywheel: Internal balance
• Head Gasket: .038” or per application

Engine Info:
• Oil: 10W30 Conventional / Non Synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

Notes: Requires a reduced base circle camshaft.

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary.

The post ATK SP48 Chevy 427CI Short Block Flat Top Pistons appeared first on ATK High Performance Engine.

Recommended Components:
• Balancer: Internal balance
• Flexplate/Flywheel: Internal balance
• Head Gasket: .038” or per application

Engine Info:
• Oil: 10W30 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

Notes:
• No mechanical fuel pump provisions

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary.

The post ATK SP41-1P Chevy 489/496CI Stroker Short Block +20cc Dome Pistons 1pc Seal appeared first on ATK High Performance Engine.

Recommended Components:
• Balancer: Internal balance
• Flexplate/Flywheel: Internal balance
• Head Gasket: .038” or per application

Engine Info:
• Oil: 10W30 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

Notes:
• No mechanical fuel pump provisions

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.

The post ATK SP98 Chevy 489/496CI Stroker Short Block +20cc Dome Pistons 1pc Seal appeared first on ATK High Performance Engine.

Engine Specifications:
• Block: 100% New American Made Block 1pc Seal
• Bore/Stroke: 4.000” x 3.750”
• Displacement: 377CI
• Crankshaft: Scat nodular iron external balance rear of the crank/internal balance front of the crank
• Rods: Scat 4340 forged I beam with ARP 8740 bolts
• Pistons: Forged -3.7cc Flat Top
• Compression Ratios: 58cc = 12.1:1 / 64cc = 11.2:1 / 70cc=10.5:1 (can vary due to deck height/gasket thickness)
• Rings: Plasmamoly
• Camshaft Bearings: Dura-Bond, installed and clocked to OEM position
• Freeze Plugs: Brass, installed and sealed
• Oil Galley Plugs: Installed and sealed
• Flexplate/Flywheel: External balance 168 tooth (with Scat kit)

Recommended Components:
• Balancer: Internal balance
• Head Gasket: .038” or per application
Engine Info:
• Oil: 10W30 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.

The post ATK SP52NB 100% New CHEVY 377CI Stroker Forged 3.7cc Flat Top Pistons appeared first on ATK High Performance Engine.

Recommended Components:
• Balancer: Internal balance
• Head Gasket: .038” or per application
Engine Info:
• Oil: 10W30 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.

The post ATK SP15NB 100% New Chevy 377CI Stroker Short Block -18cc Dish Piston 1pc Seal appeared first on ATK High Performance Engine.

Engine Specifications:
• Block: Dart Big M Sportsman 4 bolt main 2pc rear main seal
• Bore/Stroke: 4.600” x 4.750”
• Displacement: 632CI
• Crankshaft: Scat 4340 forged internally balanced
• Rods: Scat 4340 forged H beam with ARP 8740 bolts
• Pistons: 2618 Forged +3.4cc Flat Tops
• Compression Ratios: 112cc = 11.3:1 / 118cc = 10.8:1 / 121cc = 10.6:1 (can vary due to deck height/gasket thickness)
• Rings: Plasmamoly
• Camshaft Bearings: Dura-Bond, installed and clocked to OEM position
• Freeze Plugs: Brass, installed and sealed
• Oil Galley Plugs: Installed and sealed

Recommended Components:
• Balancer: Internal balance
• Flexplate/Flywheel: Internal balance
• Head Gasket: .038” or per application

Engine Info:
• Oil: 10W30 Conventional / Non Synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application
• Head Gaskets: .038” or per application

Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.

The post ATK SP108 Chevy 632CI Short Block +3.4cc Flat Tops appeared first on ATK High Performance Engine.