In Stock
Inspected & Documented
Condition notes recorded before palletizing.
30-Day Startup Warranty
Covers block, heads and internal moving components.
In Stock & Ready to Freight
Engine Components
Buick 425 Nailhead Pistons
€358.87
+ freight from €89.00, insured road freight, priced by delivery region
(rates)
From €447.87 delivered
- ISPM 15 heat-treated Euro palletized & weatherproof shrink-wrapped
- Insured European road freight delivery with hydraulic tail-lift service
- Dispatches in 1–2 business days from our UK & European Logistics Centre
- Transit typically 1–3 business days (UK) / 3–6 business days (Continental Europe)
Need a matched transmission, controls or wiring package? Speak with a parts specialist.
Details & Inspection Notes
Sized for the '63-'66 Buick 425 Nailhead, this piston set uses a high-silicon A-332 aluminum casting at a 4.3125-inch bore, machined on modern CNC equipment for consistent dimensions across the set.
What makes the set
Each set is precision balanced and weight-matched, holding no more than an 8-gram spread from the lightest piston to the heaviest, which helps the rebuilt engine run smoothly at higher RPM rather than vibrating under load.
Before you order
Match your block to the '63-'66 Buick 425 Nailhead and confirm a 4.3125-inch bore before buying, since this set is machined to that specific size rather than a universal fit. Have an experienced engine builder handle installation, ring gap checks, and final balancing verification during assembly.
Common questions
What's the bore size? 4.3125 inches, machined specifically for the 425 Nailhead.
How are the pistons balanced? Weight-matched to within 8 grams across the full set.
What material are the pistons cast from? A-332 aluminum alloy, chosen for its high silicon content.
Startup & Installation Checklist
- Inspect all external gaskets, seals, spark plugs and timing components prior to installation.
- Refill engine oil, transmission gear oil and coolant to manufacturer-specified capacities before initial cranking.
- Prime the lubrication system and verify ECU wiring pinouts, sensors, and ground connections.
- Startup warranty covers internal lubricated components, cylinder heads, and engine block for 30 days from delivery.
Full terms: 30-day startup warranty · returns
