Description

Engine Specifications:

Block: Seasoned 6.0L Iron Gen IV with ARP main studs

Bore/Stroke: 4.030” x 4.000”

Displacement (cu.in): 408

Crankshaft: Manley 4340 forged 24 tooth reluctor wheel

Rods: Manley 4340 forged H beam 6.125” ARP 2000 bolts

Pistons: Manley 2618 forged -29cc dished moly skirt coated

Rings: Total Seal CS AP with steel top rings gapped for boost/nitrous

Compression Ratios: 64cc = 9.3:1 / 68cc = 9.0:1 / 72cc = 8.7:1 (can vary due to deck height/gasket thickness)

Camshaft Bearings: Installed and Clocked to OEM Position

Freeze Plugs: Installed and Sealed

Oil Galley Plugs: Installed and Sealed

Recommended Components:

Balancer- Internal balance

Flex plate/ Flywheel- Internal balance

Head Gasket: .051” or per application

Oil Pump: Melling #10295 with high pressure spring

Engine Info:

Oil: 10W40 Non synthetic for first 3000 miles

Oil Filter: Wix or K and N per application

Notes:

ATK’s Boost/Nitrous short blocks are meant for engines running these setups. Bearing clearances and ring gap have been taken into consideration for this series of short blocks.

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.

KEY SPECS
MFG. Part #	SP40-G4-B
Brand	ATK Engines
Crate Engine Type	Short Block
Engine Displacement	6.7 liters
Piston Material	Forged Aluminum
Crankshaft Material	Forged 4340 Steel
Connecting Rod Material	Forged 4340 Steel
Engine Balance	Internal
Rear Main Seal Style	1-piece
Oil Pan Included	No
Timing Cover Included	No