Manley Pro Series Crankshafts 190290 CRANK-4340 FORGE 4.250 STROKE

SKU: MAN190290

Crankshafts

Manley Performance

Manley Pro Series Crankshafts 190290 CRANK-4340 FORGE 4.250 STROKE

SKU: MAN190290

Crankshafts

LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.

We accept

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 10:12:06

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: 190290
Product Attributes - Part Type: Crankshafts
Product Attributes - Product Line: Manley Pro Series Crankshafts
Product Attributes - UPC: 807298081472
Product Attributes - Engine Stroke (in.): 4.250 in.
Product Attributes - Crankshaft Material: Forged 4340 steel
Product Attributes - Engine Balance: Internal
Product Attributes - Rear Main Seal Style: 2-piece
Product Attributes - Lightened: No
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: 76.000 lbs.
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Crankshaft has center counterweights.

Reference Information

Brand Name/s	Manley Performance
StreetFX SKU	man190290
SFX Item ID	4927470
Supplier Item Code	4927470
Manufacturer SKU	190290
Manufacturer UPC	807298081472
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)	6.385 in.
Crankshaft to Flywheel/Flexplate Attachment	6-bolt