Home / Shop / Eagle Competition Rotating Assemblies 129174030 Assembly, Competition, Forged 4340 Crankshaft, Forged Flat Pistons, 1-Piece Seal, Chevy, 408, Kit

Eagle Competition Rotating Assemblies 129174030 Assembly, Competition, Forged 4340 Crankshaft, Forged Flat Pistons, 1-Piece Seal, Chevy, 408, Kit

SKU: EAG129174030

Engine Rotating Kits

Eagle

Eagle Competition Rotating Assemblies 129174030 Assembly, Competition, Forged 4340 Crankshaft, Forged Flat Pistons, 1-Piece Seal, Chevy, 408, Kit

SKU: EAG129174030

Engine Rotating Kits

BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.

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Description

Eagle competition rotating assemblies consist of name-brand quality components for a wide range of engines at an affordable price. Depending upon your selection, these kits may feature a crankshaft, pistons, piston rings, rod and main bearings, or connecting rods. Balanced assemblies are also available. Order the model designed for fitment on your year/make vehicle and engine application.

Part Type

Engine Rotating Kits

Data: v4.2 - Upd: 2026-10-14 11:16:40

Specifications

Product Attributes - Brand: Eagle Specialty Products
Product Attributes - Manufacturer's Part Number: 129174030
Product Attributes - Part Type: Engine Rotating Kits
Product Attributes - Product Line: Eagle Competition Rotating Assemblies
Product Attributes - UPC: 793348802978
Product Attributes - Actual Engine Displacement: 6.7L/408
Product Attributes - Rear Main Seal Style: 1-piece
Product Attributes - Bore (in.): 4.030 in.
Product Attributes - Bore (mm): 102.362mm
Product Attributes - Engine Stroke (in.): 4.000 in.
Product Attributes - Balanced: No
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Piston Style: Flat top, with two valve reliefs
Product Attributes - Harmonic Balancer Included: No
Product Attributes - Flexplate Included: No
Product Attributes - Flywheel Included: No
Product Attributes - Pistons Included: Yes
Product Attributes - Piston Head Volume (cc): +4.00cc
Product Attributes - Wrist Pin Style: Floating
Product Attributes - Piston Rings Included: Yes
Product Attributes - Piston Ring Facing Material: Plasmamoly
Product Attributes - Crankshaft Included: Yes
Product Attributes - Crankshaft Material: Forged 4340 steel
Product Attributes - Engine Balance: Internal
Product Attributes - Connecting Rods Included: Yes
Product Attributes - Connecting Rod Length Center to Center (in.): 6.125 in.
Product Attributes - Connecting Rod Material: Forged 4340 steel
Product Attributes - Connecting Rod Beam Style: H-beam
Product Attributes - Rod Bearings Included: Yes
Product Attributes - Rod Bearing Undersize (in.): Stock
Product Attributes - Rod Bearing Undersize (mm): Stock
Product Attributes - Main Bearings Included: Yes
Product Attributes - Main Bearing Undersize (in.): Stock
Product Attributes - Main Bearing Undersize (mm): Stock
Product Attributes - Cam Bearings Included: No
Product Attributes - Gaskets Included: No
Product Attributes - Oil Pump Included: No
Product Attributes - Camshaft Included: No
Product Attributes - Lifters Included: No
Product Attributes - Timing Chain and Gears Included: No
Product Attributes - Plastigage Included: No
Product Attributes - Assembly Lubricant Included: No
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Notes: Uses 24-tooth reluctor ring.

Reference Information

Brand Name/s	Eagle
StreetFX SKU	eag129174030
SFX Item ID	4778160
Supplier Item Code	4778160
Manufacturer SKU	129174030
Manufacturer UPC	793348802978
Alternative References	ESP-129174030, 1-Piece

Compatibility

Application Data

Make CHEVROLET
Beginning Year 1999
Ending Year 2019
Engine Type V8
Engine Family Chevy small block Gen III/IV (LS-based engines)
Engine Size 6.0L/364
Rod Length (application) 6.125 in.