MAHLE 928965330 PowerPak Forged Piston Ring Kit Big Block Chevy Bore - and 4.530

The MAHLE 928965330 PowerPak is a complete race-proven piston assembly kit designed for Big Block Chevy engines with 547 cubic inches of displacement. This premium forged piston set features hand-deburred pistons, high-quality steel wrist pins, round wire locks, and low-drag performance rings—everything needed for a professional engine build.

Key Specifications:

• Bore Size: 4.530 inches
• Stroke: 4.25 inches
• Rod Length: 6.385 inches
• Piston Pin Diameter: 0.990 inches
• Dome Volume: +13cc
• Compression Ratio: 10.7:1 (with 118cc heads)
• Ring Grooves: 1.5mm x 1.5mm x 3.0mm
• Piston Weight: 561 grams
• Material: Forged 4032 high-silicon low-expansion aluminum alloy
• Quantity: Set of 8 pistons with rings

Advanced Performance Features:

• Ultra-flat ring grooves and low-drag rings for improved sealing that minimizes parasitic drag
• Phosphate dry lubricant coating protects against ring micro-welding and pin galling during initial startup and break-in
• Proprietary Grafal anti-friction coating applied to each piston skirt
• Low-expansion aluminum alloy construction reduces piston-to-wall clearance requirements and features forced pin oiling for increased wrist pin lubrication

This complete PowerPak kit is engineered for Big Block Chevy 547ci builds with 4.530-inch bore, 4.250-inch stroke, and 6.385-inch connecting rods. The domed piston design with +13cc volume delivers a 10.7:1 compression ratio when paired with 118cc cylinder heads, making this an excellent choice for high-performance street and racing applications.