Enginetech P1537(8) | Flat Top Pistons for 57-67 GM/Chevrolet 4.6L/283 OHV V8 | 1.779" Compression Height | .030 Oversized Enginetech Premium Quality Piston Sets for All Your Engine Needs. Discover unparalleled performance and durability with our top-of-the-line Piston Sets. Crafted using the latest in engineering technology, these pistons are designed to meet and exceed original equipment (OE) specifications, ensuring a perfect fit and exceptional functionality for your engine. Advanced Materials & Construction Each piston set is made from high-quality materials, including cast aluminum, hypereutectic, and forged applications.