CP Pistons SC7299-4 Forged Piston & Ring Set 89mm 9.0:1 for Nissan KA24DE/KA24E

Vehicle Fitment

• 1989-1990 Nissan 240SX (S13, 2.4L I4 SOHC KA24E)
• 1991-1998 Nissan 240SX (S13/S14, 2.4L I4 DOHC KA24DE)
• 1990-1997 Nissan Hardbody Pickup D21 (2.4L I4 SOHC KA24E)
• 1993-2001 Nissan Altima (2.4L I4 DOHC KA24DE)
• 1990-1992 Nissan Stanza (2.4L I4 SOHC KA24E)
• 1990 Nissan Axxess (2.4L I4 SOHC KA24E)
• 1998-2004 Nissan Frontier (2.4L I4 DOHC KA24DE)
• 2000-2004 Nissan Xterra (2.4L I4 DOHC KA24DE)

Fitment Notes

• Compression ratio differs by engine variant: 9.0:1 with the KA24DE (DOHC) and 8.0:1 with the KA24E (SOHC) due to different combustion chamber volumes
• 89mm bore is standard bore size - no overbore required
• Standard bore pistons are not recommended for use in a worn bore unless minimal wear is present and correct piston-to-bore clearance is maintained
• Compatible with turbo, supercharger, nitrous, and naturally aspirated applications
• For +0.5mm overbore applications, see part number SC7300
• Requires professional engine assembly by a qualified builder

Features

• Forged from high-strength aluminum for superior durability under forced induction and high-cylinder-pressure conditions
• Dish-style piston crown with no valve reliefs for optimized combustion chamber geometry
• Fully CNC machined and balanced to within +/- 1 gram for smooth, vibration-free operation
• Accumulator groove reduces ring flutter and improves cylinder sealing under boost
• Dual forced pin oilers provide enhanced wrist pin lubrication during high-load conditions
• Deep valve reliefs accommodate high-lift camshaft profiles and oversized valves
• Pin lock grooves included for secure and easy wrist pin lock installation
• Pin fitting final hone performed at the factory for precise wrist pin bore tolerance
• Wrist pins included at no additional cost
• Proudly manufactured in the USA

Specifications

• Part Number: SC7299-4
• Engine Application: Nissan KA24E (SOHC) / KA24DE (DOHC) 2.4L I4
• Bore Diameter: 89mm (3.504", standard bore)
• Stroke: 96mm
• Connecting Rod Length: 165mm (6.496")
• Compression Height: 1.339" (34.01mm)
• Dome/Dish Volume: -20.2cc (Dish)
• Compression Ratio: 9.0:1 (KA24DE) / 8.0:1 (KA24E)
• Wrist Pin Diameter: .827" (21mm)
• Wrist Pin Dimensions: .827" x 2.250" x .150" wall
• Piston Style: Dish, no valve reliefs
• Piston Material: Forged Aluminum
• Ring Set: Included
• Product Series: CP Sport Compact
• Set Quantity: 4 Pistons

Included Components

• 4x CP-Carrillo Forged Pistons
• 4x Matched Piston Ring Sets
• 4x Wrist Pins (.827" x 2.250", .150" wall)
• 4x Pin Locks

Product Description

The CP Pistons SC7299-4 is a Sport Compact Series forged piston and ring set engineered for the Nissan KA24E and KA24DE 2.4L inline-4 engines. With a standard 89mm bore, 96mm stroke, and 165mm connecting rod length, this set is a direct drop-in replacement for the factory pistons across a wide range of Nissan vehicles including the 1989-1998 240SX (S13/S14), 1990-1997 Hardbody Pickup, 1993-2001 Altima, 1998-2004 Frontier, and 2000-2004 Xterra. The -20.2cc dish crown design produces a compression ratio of 9.0:1 with the DOHC KA24DE head and 8.0:1 with the SOHC KA24E head, making these pistons suitable for both naturally aspirated performance builds and forced induction applications.

Each piston is fully CNC machined from a high-strength forged aluminum alloy and balanced to within one gram across the set. The design incorporates all of CP-Carrillo's standard shelf piston features including dual forced pin oilers for enhanced wrist pin lubrication under heavy load, an accumulator groove behind the top ring to reduce flutter and improve sealing under boost, and deep valve reliefs for compatibility with aggressive cam profiles and oversized valves. The wrist pins are included at no additional cost and are pin-fitted at the factory for precise bore tolerance, and pin locks are provided for secure retention.

The KA24 engine family has earned a reputation as one of the most durable and versatile Nissan inline-4 platforms, and the SC7299-4 is designed to unlock the full potential of these engines in high-performance applications. Whether you are building a turbocharged 240SX for drifting, a boosted Frontier for off-road racing, or a naturally aspirated Altima track car, these pistons deliver the strength, precision, and reliability needed to handle serious power levels while retaining smooth streetability. For builders requiring a +0.5mm overbore, CP offers the SC7300 with the same specifications in an 89.5mm bore.