CP7299 – Nissan KA24DE CP Shelf Pistons w/All Hardware – 89mm x 9:1

For the dedicated builder seeking uncompromising strength and precision in a high-performance KA24DE engine, the CP7299 shelf piston set represents the definitive choice. Engineered by the legendary craftsmen at CP-Carrillo, this forged piston kit transcends typical off-the-shelf components, delivering race-proven durability in a configuration optimized for street and track. Designed specifically for the Nissan KA24DE 2.4L inline-four, the CP7299 pistons feature an 89mm (3.504-inch) bore and a calculated 9.0:1 static compression ratio, making them an ideal foundation for forced induction builds, high-RPM NA applications, and robust OEM replacement where factory limits are a concern. Utilizing a proprietary 2618 aluminum alloy forging and CNC-machined to exacting tolerances, each piston is a masterpiece of metallurgy and design, ensuring perfect ring seal, reduced friction, and ultimate reliability under extreme cylinder pressures. This kit includes all necessary wrist pins and spiral locks, providing a complete, ready-to-assemble solution for your next engine masterpiece.

Unmatched Engineering & Core Benefits

The CP7299 is not merely a piston; it is a system engineered for synergistic performance within the KA24DE’s cylinder head and block architecture. The 9.0:1 compression ratio is a strategic sweet spot, offering a significant margin of safety for forced induction while maintaining excellent off-boost throttle response and drivability—a critical consideration for street-driven performance vehicles. The 89mm bore size is a direct replacement for standard dimensions, ensuring compatibility with factory cylinder liners or aftermarket sleeves without requiring complex machining, unless overbore is specified. CP’s manufacturing process involves a controlled forging operation that aligns the grain structure of the 2618 aluminum for superior tensile and fatigue strength compared to cast or hypereutectic pistons. This material choice, while requiring slightly more warm-up time than 4032 alloy, provides the ultimate resilience against detonation, making it the de facto standard for serious turbocharged or nitrous-assisted builds where cylinder pressure spikes are inevitable.

• Race-Proven Forged 2618 Aluminum: Delivers maximum strength and ductility to withstand extreme combustion pressures and detonation events far beyond OEM limits.
• Optimized 9.0:1 Compression Ratio: Provides the perfect balance for forced induction applications, offering safety headroom while preserving street manners and throttle response.
• Precision CNC Machining: Ensures exact dimensional consistency, perfect pin fitment, and optimal ring groove geometry for superior sealing and oil control.
• Included High-Quality Hardware: Comes with matched wrist pins and spiral locks, eliminating sourcing guesswork and ensuring a complete, compatible assembly.
• Direct “Shelf” Fitment for KA24DE: Designed as a direct replacement for the 89mm bore, simplifying the build process for both stock displacement and overbore scenarios.

Design Features & Technical Refinements

Every contour of the CP7299 piston is a result of computational analysis and track validation. The piston crown is designed to promote efficient combustion flame travel and is compatible with a wide range of aftermarket and OEM cylinder head configurations. Valve reliefs are precision-machined to accommodate aggressive camshaft profiles without compromise. The ring package is designed for modern, low-tension rings, which reduce parasitic drag and improve horsepower output while maintaining excellent oil control and blow-by prevention. The skirt profile utilizes an advanced anti-friction coating in many applications (confirm coating specifics per latest CP specs) to reduce scuffing during cold starts and high-load operation. The internal machining, including the pin boss design and under-crown geometry, is optimized to manage thermal stress and minimize weight without sacrificing strength, contributing to a more responsive, freely revving engine. Understanding the role of compression ratio is vital; for a deeper dive into the thermodynamics, consider this resource on compression ratio and thermal efficiency from a trusted technical source.

Vehicle Fitment & Application Guidelines

The CP7299 piston kit is engineered specifically for the Nissan KA24DE dual overhead cam (DOHC) 2.4-liter engine. Correct fitment is paramount for performance and reliability. This kit is a direct fit for engines with a standard 89mm bore diameter. Always verify engine condition and perform necessary machine work (honing, decking) before installation.

Primary Applications Include:

• Nissan 240SX (S13, S14) 1991-1998
• Nissan Hardbody Truck (D21) 1990-1997 (with KA24DE engine)
• Nissan Pathfinder (WD21) 1990-1995 (with KA24DE engine)
• Nissan Frontier (D22) 1998-2004 (with KA24DE engine)
• Various Nissan commercial vehicles and swaps utilizing the KA24DE long block.

Critical Installation Notes: Always pair these pistons with connecting rods rated for the intended power level. Piston-to-wall clearance must be set by a qualified machinist based on CP’s recommended specifications and the final bore condition. Use a high-quality torque plate during cylinder honing to simulate block stress. Final compression ratio will be affected by deck height, head gasket thickness, and chamber volume—always calculate final static CR during assembly.

Complete Technical Specifications

The Ultimate Foundation for KA24DE Performance

Selecting the CP7299 piston kit is a decisive step toward building an indestructible KA24DE powerplant. Whether your goal is a reliable 400+ horsepower turbocharged street engine, a high-compression naturally aspirated track weapon, or simply overbuilding for absolute peace of mind, these pistons provide the foundational integrity required. They represent a symbiotic blend of advanced material science, precision manufacturing, and practical application knowledge. By investing in CP-Carrillo quality, you are not just buying components; you are integrating a piece of motorsport heritage into your engine bay, ensuring that the bottom end of your build is the last thing you’ll ever need to worry about. For the performance mechanic who understands that true reliability is born from over-engineering, the CP7299 is the unequivocal answer.