Chevy Small Block 4340 Forged Superlight Competition Rotating Assembly 407ci

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SCATPART NUMBER: 942-1-40580

Chevy Small Block 4340 Forged Superlight Competition Rotating Assembly 407ci

Name: Chevy Small Block 4340 Forged Superlight Competition Rotating Assembly 407ci
Brand: SCAT
SKU: 942-1-40580
Price: 4134.32 USD
Availability: InStock

^$4,134³²$4351.92You Save$217.60

Ships on 09/21/2026

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400 Main Journals

407 Cubic Inch

3.750'' Crank Stroke

2-Piece Rear Seal

407ci
4.155'' Bore
11.8:1 Flat Top Piston w/64cc Combustion Chamber
3.750'' Crank Stroke
6.000'' Rod Length
Unbalanced Assembly

NOTE: This assembly is unbalanced.
Assembly Includes:
4340 Forged Superlight Cranks
Q-Lite H-Beam Connecting Rods with 3/8' Cap Screws
SRP Professional Pistons & Rings
Rod Bearings
Main Bearings

Part TypeEngine Rotating Assembly Kit

BrandSCAT

Package Height14.0

Package Width19.0

Package Length26.0

Weight82.0 PG

Part CategoryPerformance Parts

Crankshaft MaterialForged 4340 steel

Piston And Ring Oversize0.03 in (0.8 mm)

Main Bearing Undersize (Mm)Stock

Wrist Pin StyleFloating

Connecting Rod Beam StyleH-beam

Rod Bearing Undersize (Mm)Stock

Piston Ring Facing MaterialPlasmamoly

Piston StyleFlat top, with two valve reliefs

Assembly Lubricant IncludedNo

Piston Head Volume (Cc)5

Gaskets IncludedNo

Rear Main Seal Style2-piece

Main Bearing Undersize (In.)Stock

Crankshaft IncludedYes

Piston Rings IncludedYes

Bore (Mm)105.537

Actual Engine Cid407

Engine Stroke3.75 in (95.25 mm)

Connecting Rod MaterialForged 4340 steel

Pistons IncludedYes

Rod Bearing Undersize (In.)Stock

QuantitySold as a kit

Main Bearings IncludedYes

Engine BalanceInternal

Rod Bearings IncludedYes

Connecting Rods IncludedYes

Oil Pump IncludedNo

Camshaft IncludedNo

Timing Chain And Gears IncludedNo

BalancedNo

Piston MaterialForged aluminum

Cam Bearings IncludedNo

Part FitmentSemi Universal

Plastigage IncludedNo

Lifters IncludedNo

Bore4.155 in (105.537 mm)

Vendor Part Number1-40580

Package Qty1

Package TypeEA

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