Manley Chevy LS 548 4.250in Stroke 4.530in Bore -20cc Rotating Assembly

SKU: MAN28548

Engine Rotating Kits

MAN Rotating Assemblies

Manley Chevy LS 548 4.250in Stroke 4.530in Bore -20cc Rotating Assembly

Manley Performance

Manley Chevy LS 548 4.250in Stroke 4.530in Bore -20cc Rotating Assembly

SKU: MAN28548

Engine Rotating Kits

MAN Rotating Assemblies

Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

Manley Rotating Assemblies are engineered as complete, matched systems to deliver maximum strength, balance, and performance in high-demand engines. Featuring precision-forged crankshafts, high-strength connecting rods, and premium pistons, each component is designed to work together seamlessly for optimal durability and efficiency. Tight tolerances and careful material selection ensure excellent load handling, reduced friction, and consistent performance under extreme RPM and cylinder pressure. By combining Manley’s proven rod, piston, and crank technologies into a unified package, these assemblies provide the reliability and confidence engine builders demand when pushing the limits of power.

Part Type

Engine Crankshaft Rotating Assembly

Data: v4.2 - Upd: 2026-09-29 08:01:07

Features

2618 Forged aluminum Platinum Series pistons with Premium Chrome Moly wrist pins
4340 Forged steel crankshaft
4340 Forged steel H-Beam connecting rods with 7/16 ARP 8740 or optional ARP 2000 cap screws
Horsepower range is 900 with the ARP 8740 and 1,500 with the optional ARP 2000 cap screws

Specifications

Product Attributes - Brand: Manley
Product Attributes - Manufacturer's Part Number: 28548
Product Attributes - Part Type: Engine Rotating Kits
Product Attributes - Product Line: Manley Rotating Assemblies
Product Attributes - UPC: 807298079714
Product Attributes - Actual Engine Displacement: 8.9L/548
Product Attributes - Rear Main Seal Style: 2-piece
Product Attributes - Bore (in.): 4.530 in.
Product Attributes - Bore (mm): 115.062mm
Product Attributes - Engine Stroke (in.): 4.250 in.
Product Attributes - Balanced: Yes
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Piston Style: Dish, with a D-shaped cup
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): -20.00cc
Product Attributes - Wrist Pin Style: Floating
Product Attributes - Piston Rings Included: Yes
Product Attributes - Piston Ring Facing Material: Plasmamoly
Product Attributes - Piston and Ring Oversize (in.): 0.030 in.
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.): 6.385 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: Does not include center counterweights. Use of an aftermarket engine block from World, Brodix, Donovan, or Chevy Performance may be required to achieve this cubic inch. Designed for use with standard deck blocks only.

Reference Information

Brand Name/s	Manley Performance
StreetFX SKU	man28548
SFX Item ID	4061649
Supplier Item Code	4061649
Manufacturer SKU	28548
Manufacturer UPC	N/A
Alternative References	4.250in, 4.530in, -20cc