Chevy SBC 350 B-4.000 DH-9.025 Aluminum Engine Block Non Finished

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MPN: PCE286.1045 UPC: 840136533030
Available Extended Warranty Eligible
US $1,595.46 US $2,659.10
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Part Number:PCE286.1045
Part Type:Engines, Bare Blocks
Block Material:A-356 Aluminum
Cylinder Bore Diameter:4.000 in.
Bore & Stroke:4.155 in. x 4.000 in. Max Recommended
Cam Journal OD:Standard SBC - 1.869
Cam Plug:2.375 in. Dia. Cup Plug
Cylinder Wall Thickness:0.275 in. min @ 4.155 in. Bore
Deck Height:9.025 in.
Deck Thickness:0.675 in. Min
Fuel Pump :Electric or Mechanical
Fuel Pump Pushrod:n/a
Freeze Plugs:10 x 1-5/8 in. Press In Cup Plugs
Lifter Bores:SBC 0.8427-0.8437 in.
Main Bearing Size: 2.450 in. (SBC 350)
Main Bearing Bore:2.649 in. (SBC 350)
Main Cap Bolts:#1 7/16 in. (2) 3/8 in. (2)
#2, 3, 4 7/16 (2) Splayed (2)
#5 7/16 in. (2) 3/8 in. (2)
Main Cap Press:0.005 in.
Main Caps:All 5 Billet Steel. 3 Center Caps Splayed
Main Cap Register:Deep Stepped Register (No Need for Dowels)
Oil System:Wet Sump - Main Priority Oiling (Can Use Dry Sump)
Oil Pump Shaft:350 0.481 in. OD - Standard
Oil Filter:SBC, Uses 2 Bolt Adapter
Oil Pan:Standard 350 SBC
Rear Main Seal:Standard 350 SBC - 2pc
Serial No. Location:n/a
Starter:Dual Bolt Pattern
Stud Holes, Head:Blind Holes
Timing Chain/Gears:Standard SBC Components
Timing Cover:Standard Cam Location SBC
Torque Specs:1 - 5 7/16 in. Bolts 65 ft. lbs.
1 & 5 3/8 in. Bolts - 35 ft. lbs.
Weight:110 Lbs @ 4.0 in. Bore
Quantity:Sold individually.
Notes:Check hood clearance before installing. Block orifices must all be checked for accuracy before assembly. Non Finished refers to bores not being finished honed. Slightly undersized to machine at your discretion.
Calculator:CFM Calculator


The next level of performance is these aluminum Chevy small blocks. Block is ready for the street racer or all out racer with added strength and cubic inches. All the factory flaws redesigned to eliminate all problems, still using the original water jacket design. Blocks are cast from highest quality high-density iron with extra-thick cylinder walls and decks. The blocks webs are stronger and fitted with billet steel 4-bolt main caps. Ideal for sprint cars, modifieds, late model stock cars, dragsters, unlimited open competition classes, supercharged, turbocharged and nitrous applications!

Features Include: Ductile iron sleeves and extra thick cylinder walls & decks, 4 bolt splayed mains, enlarged bosses for offset or oversize lifters and scalloped water jacket holes for improved cooling. Siamesed cylinders, dual starter mount bolt patterns for additional starter clearance. Front and rear external oil inlets, crossover and restrictor provisions to simplify plumbing with external pump. Screw in freeze plugs.

Used in 1200+HP Applications!

Brand Information

Speedmaster has become a leader in its field, built on a long term consistency of being a specialist in aftermarket automotive components. The team has shared all the finest moments in the numerous accolades for its people, its products, and its approach. Speedmaster is also one of the rare companies to produce its own products, where majority items are entirely developed and manufactured in its workshops. The ultimate token of precision, Speedmaster is the world’s only major parts manufacturer to equip cars from Standard replacement to Top Fuel Dragsters.

In 1979, the company was founded with Pete’s Performance, which was a small speed workshop. It began by building engines for customers as a hobby, and it has now grown to include selling, assembling, manufacturing and racing high performance engine parts. Over the years, the company has grown into a worldwide high performance powerhouse. Growing from a one-man bricks-and-mortar business; to now a supply chain in which en

Prop 65 Warning

This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

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