Merlin IV Big Block Chevy Cast Iron Engine Bare Block

Name: Merlin IV Big Block Chevy Cast Iron Engine Bare Block
Brand: WORLD PRODUCTS
SKU: 955-091101-55
Price: 4347.23 USD
Availability: InStock

^$4,347²³

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Ships on Sep 04, 2026

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4.495 in. Cylinder Bore

Merlin IV Cast Iron Engine Block

Big Block Chevy

2-Piece Rear Main Seal

4.495" Bore

9.800" Deck Height

55mm Babbit Camshaft Bearing Journal

.904" Diameter Lifter Bore

Nodular Iron Main Caps

Features:

High-Density Cast Iron Construction
Priority Main Oiling
Front Oil Inlet and Restrictor Provision
Bores to 4.625 in. max
Cylinder Walls 0.310 in. @ 4.600 in. Bore
Valley Accommodates OE Roller Lifters or Use +.300 in. Tall Aftermarket Lifters
Clearance for 4.375 in. Stroke - 9.800 in. Deck
Splayed 4-Bolt Main Caps with Dowels & Stepped Register, ARP Fasteners
2-Piece Rear Main Seal
Accepts Standard Big Block Chevy Components
OE-style Fuel Pump & Starter Mounts
Approximately 270 lbs
Rated to 1000+ Horsepower

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

Part TypeEngine Block

BrandWORLD PRODUCTS

Package Height16.0

Package Width23.25

Package Length25.0

Weight296.0 PG

Part CategoryPerformance Parts

Maximum Bore Diameter4.625 in (117.475 mm)

Engine Block Weight (Lbs.)260

Part FitmentSemi Universal

Deck Height9.8 in (248.92 mm)