CP-Carrillo SC7653-4 Forged Aluminum Piston & Ring Set Toyota 4AG 16V 81.5mm 12:1

Designed for naturally aspirated performance builds, this kit delivers the precision, durability, and consistency demanded by serious motorsport applications. Each piston is CNC-machined and balanced to within +/- 1 gram, ensuring a perfectly matched set for smooth, high-revving operation.

Featuring an 81.50mm (+0.5mm oversize) bore and a 12.0:1 compression ratio, these pistons are purpose-built to extract maximum power from the 4AG 16V platform. The dome piston design incorporates four deep valve reliefs for compatibility with oversized valves and aggressive cam profiles. Custom skirt cam and barrel geometry minimizes friction and optimizes ring seal for peak cylinder pressure.

Key Specifications:

• Bore: 3.209 in. / 81.50mm (+0.5mm oversize)
• Stroke: 77.00mm (stock)
• Rod Length: 122.00mm
• Compression Height: 1.208 in. / 30.7mm
• Dome Height: 0.155 in.
• Piston Head Volume: +5.0cc
• Compression Ratio: 12.0:1
• Pin Diameter: 0.787 in. (20mm)
• Wrist Pin Style: Press-fit or floating
• Ring Pack: 1.0mm x 1.2mm x 2.8mm
• Piston Material: Forged aluminum
• Piston Style: Dome with four valve reliefs
• Cylinders: 4
• Recommended Ring Part Number: CPN-3209

• 4x forged aluminum pistons
• Piston rings included
• Wrist pins included
• Wrist pin retainers included

The SC7653-4 is rated for naturally aspirated applications and is ideal for track-day, road racing, or high-performance street builds on the Toyota 4AG 16V engine. Paired with CP-Carrillo's proprietary ring designs and accumulator groove technology, this kit provides exceptional ring seal and long-term durability under sustained high-RPM conditions.