Wiseco Professional Series Forged Piston Set

2005–2010 Dodge Challenger, Charger, Magnum, Jeep Grand Cherokee 6.1L HEMI

Part #: K471X25

Overview

The Wiseco Professional Series Forged Piston Set is engineered specifically for the Chrysler 6.1L 3rd Generation HEMI engine, delivering exceptional strength and durability for high-performance and racing applications. Featuring a precise 4.080-inch bore size and a +4cc dome volume, these pistons optimize combustion chamber dynamics to enhance power output and efficiency. Designed for serious racers and engine builders, this piston set withstands heavy to severe duty conditions, making it ideal for track, drag racing, and aggressive street builds.

Whether upgrading a factory engine or building a high-output race motor, Wiseco’s Professional Series pistons provide the reliability and precision needed to push your 6.1L HEMI beyond stock limits with confidence.

Key Features

Wiseco’s Professional Series pistons incorporate advanced engineering and manufacturing techniques to ensure maximum performance and durability:

• Forged from high-strength aluminum alloy for superior fatigue resistance and durability under extreme conditions
• +4cc dome design enhances compression and combustion efficiency for improved power delivery
• Precision-machined 4.080-inch bore diameter ensures exact fitment and optimal sealing
• 1.205-inch compression height matches stock shelf pistons for proper deck clearance
• 0.927-inch wrist pin diameter engineered for high load capacity while minimizing piston weight
• Includes premium piston rings designed for excellent sealing and wear resistance
• Built to withstand heavy-duty racing conditions and high RPM operation
• Specifically designed for Chrysler’s 6.1L 3rd Gen HEMI engines to guarantee perfect compatibility

Construction & Design

Wiseco’s Professional Series pistons are crafted using state-of-the-art forging processes that create a dense, uniform grain structure, significantly enhancing strength and durability compared to traditional cast pistons. The forged aluminum alloy construction offers an excellent strength-to-weight ratio, reducing reciprocating mass and improving throttle response and engine efficiency.

The +4cc dome shape is CNC-machined to exact specifications, optimizing the combustion chamber shape and compression ratio for performance gains without compromising reliability. Each piston maintains a stock compression height, allowing for straightforward installation in engines designed for factory-style pistons. Precision balancing and tight manufacturing tolerances ensure consistent performance and longevity, even under the most demanding racing conditions.

Installation & Fitment

This piston set is a direct replacement for Chrysler 6.1L 3rd Gen HEMI engines requiring a 4.080-inch bore size and stock compression height. Installation follows standard engine rebuild procedures and is recommended for professional engine builders or experienced enthusiasts. No modifications to the engine block or connecting rods are necessary when using these pistons within their specified dimensions.

Proper ring end gap and clearance checks should be performed during assembly to ensure optimal performance and reliability. This kit is designed to fit the following vehicles:

• 2005–2010 Dodge Challenger 6.1L SRT8
• 2005–2010 Dodge Charger 6.1L SRT8
• 2005–2010 Dodge Magnum 6.1L SRT8
• 2005–2010 Jeep Grand Cherokee 6.1L SRT8

What's Included

• Set of 8 forged aluminum pistons with +4cc dome volume
• Premium piston rings matched to the piston design
• Complete piston pin bores sized for 0.927-inch wrist pins

Ideal For

• High-performance and racing engine builds requiring durable forged pistons
• Builders upgrading Chrysler 6.1L 3rd Gen HEMI engines for increased compression and power
• Applications demanding heavy to severe duty use, including track and drag racing
• Engineers and enthusiasts seeking premium-quality pistons with proven reliability

Wiseco is a forged piston and engine-components brand trusted in both automotive and powersports performance, offering precision-made pistons and kits for high-RPM, high-boost, and high-load builds. Whether you’re rebuilding for durability or chasing serious horsepower, Wiseco parts are chosen for strength, consistency, and proven performance in demanding conditions.