Chevrolet’s ZZ632/1000 big-block crate engine makes 1,004 horsepower, 876 lb-ft of torque, and has a suggested price of around $48,000.
Chevrolet is no stranger to the big block, having built multiple during the golden era of the muscle car in the 1960s and 1970s. The automaker hasn’t lost its way over the decades, either, debuting one of its most powerful big-blocks ever in 2021 — the 632. Specifically, this large lump is called the ZZ632/1000, and while that may read like a printer’s part number, the name can be pulled apart and decoded.
The 632 part refers to the big-block’s displacement of 632 cubic inches, or 10.4 liters. The largest big-block V8 engine ever fitted to a production car was the 500-CI Cadillac engine of the 1970s, which goes to show just how hefty this crate engine is. The “1000” part of the name relates to this engine’s output, although Chevy is selling itself a little short here, as the engine actually churns out 1,004 horsepower to be precise.
