Description

These Buick 425 Nailhead Pistons are a replacement cast aluminum 4.3125 inch bore piston set for the 1963-1966 Buick 425 Nailhead engine. Cast from high-silicon A-332 aluminum alloy and machined on modern CNC equipment, the Buick 425 Nailhead Pistons are precision balanced and weight-matched within 8 grams from lightest to heaviest for smooth, reliable performance in your Nailhead rebuild.

Replacement cast aluminum 4.3125″ bore piston set for ’63-’66 Buick 425 Nailhead.

Cast from high silicon A-332 aluminum alloy
Machined on modern CNC machinery
Precision balanced & weight-matched sets
Balanced to within 8 grams from the lightest to the heaviest piston