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Instruction Sheets for Part Number WRL-091105
World Products Merlin Gen VI Engine Blocks
Engine Block, Cast Iron, Nodular Iron 4-Bolt Mains, 4.500 in. Bore, 1-Piece Seal, 9.800 in. Deck, Chevy, Big Block, Each
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Estimated Ship Date: Nov 30, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
091105
Part Type:
Product Line:
Summit Racing Part Number:
WRL-091105
UPC:
816642021682
Main Journal Type:
Chevy 454
Engine Block Material:
Cast iron
Engine Block Style:
Aftermarket
Engine Block Deck Height:
Standard deck
Deck Height (in.):
9.800 in.
Cylinder Bore as Shipped:
4.495 in.
Cylinder Bore Diameter:
4.500 in.
Maximum Bore Diameter (in.):
4.625
Camshaft Location:
Standard
Engine Block Weight (lbs.):
270 lbs.
Main Bolt Style:
4-bolt
Main Caps Included:
Yes
Main Cap Material:
Nodular iron
Main Cap Fasteners Included:
Yes
Main Bearings Included:
No
Rear Main Seal Style:
1-piece
Finished Cylinder Bores:
No
Raised Cam Location:
No
Cam Bearings Included:
No
Freeze Plugs Included:
No
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Block machined for 4.375 in. steel rod stroke clearance. Expanded water jackets for better cooling. Main, Cam and Lifters Finished to GM tolerances. Clearances need to be checked before assembly. Siamese Cylinder Bore. Uses OE or + .300 in. tall lifter. ARP Main Cap Fasteners Included.
World Products Merlin Gen VI Engine Blocks
World Products has improved virtually every area of the new Merlin Gen VI engine blocks, producing one of the most technologically advanced and best-performing iron BBC engines available today! New features on these big block Chevy engines include thicker main webs for increased strength and thicker cylinder walls (nominally .250 in. @ 4.600 in. bore). They can utilize OE roller lifters or +0.300 in. tall aftermarket tie bar lifters. The World Products Merlin Gen VI engine blocks also include a standard Mark IV fuel pump boss for those wanting to keep a mechanical fuel pump.
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