MAHLE 928957000 PowerPak Forged Piston Ring Kit Big Block Chevy Bore - 540ci 4.500

The MAHLE 928957000 PowerPak Piston and Ring Kit is a complete race-proven performance package designed for Big Block Chevy 540 cubic inch engines. This comprehensive kit includes forged pistons, low-drag performance rings, high-quality steel pins, and round wire locks—everything needed for a professional engine build.

Engine Specifications:

• Displacement: 540 cubic inches
• Bore: 4.500 inches
• Stroke: 4.250 inches
• Rod Length: 6.385 inches
• Compression Height: 1.270 inches
• Pin Diameter: 0.990 inches
• Crown Volume: -3cc dome
• Piston Weight: 517 grams
• Compression Ratio @ 118cc: 9.4:1

Premium Construction Features:

• Forged from 4032 high silicon low expansion aluminum alloy for superior strength and thermal stability
• Hand-deburred for precision fit and balance
• Slipper skirt design reduces weight and friction compared to traditional full-round pistons
• Ultra-flat ring grooves with low-drag performance rings for improved sealing and reduced parasitic loss

Performance Coatings:

• Phosphate dry lubricant coating protects against ring micro-welding and pin galling during initial startup and break-in
• Proprietary Grafal anti-friction coating on piston skirts reduces drag, scuffing, friction, and cylinder bore wear while minimizing piston noise

This PowerPak kit delivers measurable horsepower gains through improved ring seal and reduced friction. MAHLE's advanced ring groove technology and performance coatings create "free" horsepower by minimizing parasitic drag throughout the RPM range. Ideal for high-performance street engines, drag racing applications, and marine performance builds.