Cast iron, cast aluminum and billet engine blocks made or machined in the USA for Chevy, Ford, Hemi, LS and Toyota engines.
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Aftermarket engine blocks are built stronger than factory blocks, with thicker walls and decks, larger bore and stroke capacity and stronger main caps. The makers on this page machine cast iron and cast aluminum blocks in-house, including race blocks from a company with its own foundry, and carve billet blocks from solid aluminum, for small- and big-block Chevy, LS, small-block Ford, Gen II and Gen III Hemi and Toyota 2JZ engines.
A block is the start of a rotating assembly. Crankshafts, connecting rods and pistons have their own pages.
BRODIX makes cast aluminum race blocks: HD sprint and late-model small blocks (8B 1000 and HD 410), a 4.500 bore-spacing small block (8B 1200), the 8B 2000 big block in A-356 aluminum with cast-iron sleeves and 1044 steel billet main caps, and a 5.0 bore-spacing block (8B 5000).
Made in: Mena, AR (blocks machined in-house at the company's foundry and machine shop).
Source: Performance Racing Industry, 2022, checked 10/2026
Mena, AR
Callies sells engine blocks machined by its sister company, Energy Manufacturing: billet aluminum blocks for big-block Chevy, LS and small-block Ford engines and alcohol Hemi racing, plus cast iron and cast aluminum Gen II and Gen III Hemi blocks and a cast iron big-block Chevy block.
Made in: Fremont, OH (blocks machined by Energy Manufacturing).
Source: Callies engine blocks, checked 10/2026
Fremont, OH
Dart engine blocks in cast iron, ductile iron and cast aluminum, including the Big M and Big M2 Big Block Chevy blocks. Dart also makes blocks for Small Block Chevy, Small Block Ford, Gen III LS Next, Gen 3 Hemi and Toyota 2JZ, built for high-horsepower street and race engines.
Made in: Warren, MI. Blocks are machined and assembled at Dart's own facility.
Source: Dart About Us, checked 10/2026
Warren, MICast iron blocks are strong and the lowest cost. Aluminum blocks save weight. Billet blocks are machined from solid aluminum for the highest-horsepower racing engines and cost the most. Check bore size, deck height and main-cap style against the crankshaft and pistons you plan to use.
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A company may be based in the USA while making some products elsewhere. Check the manufacturer's own site for where a specific product is made.