Buick 401 Nailhead Pistons

Upgrade your classic Buick with a set of replacement cast aluminum pistons, designed specifically for the 1959-1966 401 Nailhead engine. Crafted from high-silicon A-332 aluminum alloy for durability and reduced weight.

These pistons are machined using state-of-the-art CNC machinery, ensuring exact tolerances and a precise fit. Each set undergoes rigorous balancing, with pistons matched to within 8 grams, guaranteeing smooth operation and reduced engine stress.

The included 401 rings feature a cast top and cast second ring design, contributing to reliable compression and performance. Experience the difference that precision engineering makes in your vintage Buick.