General Motors® Hydraulic Lifters #5232720 HL-66 NOS (Set of 16) 
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General Motors® Hydraulic Lifters #5232720 HL-66 NOS (Set of 16) – Truck & Heavy Duty Applications
This is a complete set of General Motors® Hydraulic Lifters, part number 5232720, model HL-66, designed specifically for truck and heavy-duty engine applications. They are compatible with a wide range of GM vehicles, including those powered by small-block and big-block engines from the 1960s to the 1990s, making them ideal for restorations or replacements.
The set includes 16 lifters in New Old Stock (NOS) condition, still in their original GM-branded packaging. While the box shows signs of wear from long-term storage, the lifters themselves are unused and retain their factory specifications. Each lifter is made of hardened steel for durability, ensuring long-lasting functionality in demanding truck or industrial settings.
This set is perfect for collectors of vintage GM parts or mechanics restoring classic GM trucks. Authentic GM-marked parts like these are becoming increasingly rare, adding to their value for period-correct restorations.
Condition:
- New/Open Box: The lifters are in unused condition, showing no signs of prior installation or use.
- The original GM box has visible wear, including scuffs, discoloration, and minor edge damage, but remains structurally intact and labeled.
Specifications:
- Part Number: #5232720
- Model: HL-66
- Type: Hydraulic Flat Tappet Lifters
- Material: Hardened Steel
- Set Quantity: 16 lifters (2 sets of 8)
- Dimensions: Each lifter has an approximate diameter of 0.84 inches (21.33 mm) and weighs 3.68 ounces (104.3 grams).
Compatibility:
- Designed for a variety of GM vehicles, including Chevrolet, GMC, Buick, Oldsmobile, and Pontiac, with small-block and big-block V8 engines.
- Suitable for engine sizes like 5.0L, 5.7L, and 7.4L commonly found in trucks and heavy-duty applications.