Manley Pro Series Crankshafts 190250 CRANK-4340 FORGE 4.375 STROKE

SKU: MAN190250

Crankshafts

Manley Performance

Manley Pro Series Crankshafts 190250 CRANK-4340 FORGE 4.375 STROKE

SKU: MAN190250

Crankshafts

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

Our "Pro Series" 4340 alloy steel crankshafts are available with many value packed and high-performance enhancing features for a wide range of domestic engine applications.

Part Type

Engine Crankshaft

Data: v4.2 - Upd: 2026-10-14 10:12:07

Features

Enhanced Strength: A multi-step heat treatment process and nitriding enhance the crankshafts' strength and longevity.
Lightweight Design, 4340 Non-Twist Forging: Our crankshafts feature a lightweight 4340 non-twist forging, ensuring durability and performance.
Micro-Polished Journals: Large radius journals are micro-polished to reduce friction and enhance performance.
Rigorous Quality Assurance: Each crankshaft undergoes stress relief, shot peening, and 100% magnafluxing to meet our stringent quality standards.

Specifications

Product Attributes - Brand: Manley
Product Attributes - Manufacturer's Part Number: 190250
Product Attributes - Part Type: Crankshafts
Product Attributes - Product Line: Manley Pro Series Crankshafts
Product Attributes - UPC: 807298076850
Product Attributes - Engine Stroke (in.): 4.375 in.
Product Attributes - Crankshaft Material: Forged 4340 steel
Product Attributes - Engine Balance: Internal
Product Attributes - Rear Main Seal Style: 2-piece
Product Attributes - Lightened: Yes
Product Attributes - Requires Narrow Bearings: Yes
Product Attributes - Rod Bearings Included: No
Product Attributes - Main Bearings Included: No
Product Attributes - Rod Journal Diameter (in.): 2.200
Product Attributes - Main Journal Diameter (in.): 2.750 in.
Product Attributes - Crankshaft Snout Style: Standard
Product Attributes - Weight: 66.000 lbs.
Product Attributes - Quantity: Sold individually.

Reference Information

Brand Name/s	Manley Performance
StreetFX SKU	man190250
SFX Item ID	4927460
Supplier Item Code	4927460
Manufacturer SKU	190250
Manufacturer UPC	807298076850
Alternative References	CRANK-4340

Compatibility

Application Data

Stroker Crankshaft	Yes
Make	CHEVROLET
Beginning Year	1970
Ending Year	1990
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	7.4L/454
Rod Length (application)	6.535 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt