MAHLE 930276247 PowerPak Forged Piston & Ring Kit Hemi 5.7L Stroker 396ci 3.947in Bore 4032 Alloy

The MAHLE 930276247 PowerPak Piston & Ring Kit is a complete forged piston and ring set engineered for Chrysler/Dodge Gen III 5.7L HEMI stroker builds targeting a 396 cubic inch displacement. Forged from 4032 high-silicon, low-expansion aluminum alloy, these pistons offer tighter cylinder-to-wall clearances and excellent thermal stability — making them an ideal choice for both performance street and track applications.

Key Specifications:

• Displacement: 396 ci
• Bore: 3.947 in.
• Stroke: 4.050 in.
• Rod Length: 6.125 in.
• Compression Height: 1.095 in.
• Pin Diameter: 0.927 in.
• Dome Volume: -2cc (flat top)
• Compression Ratio: 9.4:1
• Alloy: 4032 High-Silicon Aluminum
• Ring Pack: 1/1/2mm
• Advertised Piston Weight: 411 grams

Kit Includes:

• Performance piston ring set

Features & Benefits:

• Anti-friction skirt coating for reduced drag and improved break-in
• 4032 alloy construction allows tighter piston-to-wall clearances versus 2618 alloy
• Precision-machined ring grooves for consistent sealing and long service life
• Drop-in ready design — pistons are fully finished from the factory
• Dual or triple protective coatings for lasting performance and durability
• Backed by MAHLE's 90+ years of piston manufacturing experience, from OEM to Formula 1 racing

The MAHLE PowerPak platform delivers professional-grade forged piston assemblies for engine builders who demand precision, reliability, and performance. Each piston is machined to exacting tolerances with close attention to ring groove quality and consistency.