Manley Perf Platinum Series Piston Set +.020 Oversize 10.7: Fits Chrysler 6.1L HEMI

Manley Performance Platinum Series Piston Set

Chrysler 6.1L HEMI 90.9mm Stroke 4.06in Bore +0.020 Oversize

597660C-8

Overview:

The Manley Performance Platinum Series piston set is engineered specifically for Chrysler 6.1L HEMI engines, featuring a 90.9mm stroke and a 4.06-inch bore with a +0.020 oversize. Designed for professional engine builders and serious enthusiasts, these pistons deliver exceptional strength and reliability for high-performance applications.

Whether you are building a street performance engine or a track-focused powerplant, this piston set offers the durability and precision needed to handle increased power and demanding conditions. You’ll benefit from improved combustion efficiency and consistent performance thanks to the carefully engineered dome shape and compression ratio.

Key Features:

Manley’s Platinum Series pistons incorporate advanced materials and design features to ensure superior performance and longevity:

• Forged from 2618 alloy, known for excellent strength and fatigue resistance under high stress.
• Proven cam and barrel skirt profiles reduce friction and wear for enhanced durability.
• Tool steel wrist pins provide superior strength and reliability in high-RPM environments.
• Moly skirt coatings on select part numbers reduce friction and improve piston-to-cylinder wall interaction.
• 10.7:1 compression ratio with a 5cc dome design optimizes combustion for power and efficiency.
• +0.020 inch oversize bore accommodates precision machining for a perfect fit and improved sealing.
• Designed specifically for Chrysler 6.1L HEMI engines with a 90.9mm stroke and 4.06-inch bore.

Construction & Design:

The pistons are crafted from premium 2618 forged aluminum alloy, which offers a balanced combination of strength, toughness, and thermal conductivity. This material choice ensures the pistons can withstand the high cylinder pressures and temperatures typical of performance HEMI engines.

The cam and barrel skirt profiles are optimized to reduce piston slap and wear, contributing to smoother engine operation and longer service life. Additionally, the moly skirt coating on select pistons minimizes friction between the piston skirts and cylinder walls, enhancing efficiency and reducing heat buildup.

The tool steel wrist pins add another layer of durability, ensuring reliable connection between the piston and connecting rod even under extreme loads and RPMs.

Installation & Fitment:

This piston set is designed as a direct fit for Chrysler 6.1L HEMI engines requiring a 4.06-inch bore with a +0.020 oversize. It matches the factory stroke of 90.9mm and maintains the correct compression ratio for optimal performance.

Installation should be performed by experienced engine builders or technicians familiar with forged piston setups and precision machining. Proper cylinder honing and clearance measurements are essential to ensure correct fitment and performance.

What’s Included

• Complete set of forged 2618 alloy pistons with 5cc dome design
• Tool steel wrist pins
• Installation instructions and technical specifications

Ideal For:

• Professional engine builders and tuners upgrading Chrysler 6.1L HEMI engines
• Performance enthusiasts seeking durable, high-strength pistons for street or track use
• Applications requiring a +0.020 oversize bore piston with a 10.7:1 compression ratio
• Engines built for increased horsepower and torque demands