
Engine Blocks
The engine block is the foundation of the build, housing the cylinders, crankshaft and camshaft. Bare iron blocks, main fasteners and freeze plugs are offered for popular V8 families. Check the bore size, deck height, main bearing size, the number of main bolts and whether the block suits your crankshaft and rear seal type.
Showing 16 popular parts from 65 in this category. Search above or open the full catalog for the rest.




Freeze Plug, Steel, 29/64 in. Diameter, Steel, Shallow Cup, Ford, Jeep, RNB-555-004
In stock
Chevy LS 6.0L Gen IV B-4.000 M-STD DH-9.240 6-Bolt Billet Main Iron Engine Block
Available to order
−15%Chevy SBC 400 B-4.125 M-400 DH-9.025 4-Bolt Billet Main Bare Iron Engine Block
Available to order
−15%Ford 351W Windsor B-4.125 M-351C DH-9.500 4-Bolt Billet Main Iron Engine Block
In stock
−10%Chevy SBC 350 B-4.125 M-350 DH-9.025 4-Bolt Billet Main Bare Iron Engine Block
In stock
−10%Chevy SBC 350 B-4.000 M-350 DH-9.025 4-Bolt Billet Main Bare Iron Engine Block
In stock


−15%Mopar Chrysler BB 440 OEM 2 Bolt Replacement Billet Steel Main Caps
In stock
−15%
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Performance and aftermarket parts
Performance parts, shipped today.
0 parts for Chevy, Ford, GM LS and Mopar builds, from gaskets to crate engines. Free shipping on orders over $150.
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Everything between the bumpers.
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Assembly · Complete systems
Matched on our bench. Ready to fit.
Crate engines, top end kits, supercharger kits and ignition systems assembled and checked before they ship, so every component arrives already working together.
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144 refurbished and clearance parts
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Gear for the shop floor.
Motor Base apparel, drinkware, signage and gifts, in the same black, red and gold as the store.
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One point per dollar, double and triple on selected parts, across seven tiers from Red to Black. Once you reach a tier it holds for a full year, and Gold and above get a dedicated account manager.
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Pick a car. Drive the city.
Take a supercharged muscle coupe, a big-block classic, a V8 pickup, a turbo rally sedan or our concept car for a spin around a 3D city. Every car has its own engine sound, gearing and grip, and you shift with a real clutch.
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Complete automobiles, built to order
Tools & resources
Measure twice. Order once.
Install guides, catalogs and engine calculators. The calculators are pre-filled with a typical 350 small block.