Buick 401 Nailhead Pistons
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What's in the Box
Replacement cast aluminum 4.1875" bore piston set for '59-'66 Buick 401 Nailhead. Specify .030", .040" or .060" oversize.
- 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
- The 401 rings are a cast top, and a cast second ring.
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