Enginetech P50488030 Hypereutectic Piston Set GM Buick 455 7.5L V8 .030 Oversize

The Enginetech P50488030 is a hypereutectic piston set designed for the GM Buick 7.5L / 455 cubic inch OHV V8 engine. Built to precise specifications, these pistons are a dependable solution for engine rebuilds on classic Buick big-block applications requiring a .030" overbore.

Enginetech manufactures these pistons from hypereutectic aluminum alloy, a high-silicon material that offers superior heat resistance, reduced thermal expansion, and excellent wear characteristics compared to standard cast pistons. The dish-top piston crown design promotes efficient combustion dynamics in the 455 V8's combustion chamber geometry.

Key Specifications:

• Material: Hypereutectic aluminum alloy
• Piston top design: Dish top, .245" deep
• Bore size: 4.313" (109.54 mm) — .030" oversize
• Compression height: 1.975"
• Pin diameter: 0.9997"
• Top ring groove: 5/64"
• Second ring groove: 5/64"
• Oil ring groove: 3/16"
• Recommended rings: R43128 (sold separately)

Interchange / Cross-Reference Part Numbers:

• Federal-Mogul / Sealed Power: 392AP
• Silvolite: 1730

Enginetech is a trusted supplier of engine rebuild components with decades of experience producing OE-quality parts for domestic and import engines. The P50488030 piston set is an excellent choice for restoring compression and performance in your Buick 455 big-block rebuild.