Buick 425 Spijkerkop Zuigers

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