​The RSE Forged Piston RA202A-NS05B is a high-performance piston kit specifically designed for the Nissan RB26DETT engine, commonly found in models such as the Nissan Skyline GT-R R32, R33, and R34. Manufactured by Real Speed Engineering (RSE), this piston set aims to enhance engine durability and performance, making it suitable for both street and motorsport applications.

Product Specifications:

• Brand: RSE​
• Series Name: FORGED PISTON 86.50MM CH30.00 (STD 2.8)​
• Product Number: RA202A-NS05B​
• Compatible Car: Nissan Skyline GT-R R32, R33, R34​
• Compatible Engine: Nissan RB26DETT​

Key Features:

• Bore Diameter: 86.50 mm (0.5 mm overbore from the standard 86.0 mm)​
• Compression Height: 30.00 mm (matches OEM specifications)​
• Piston Material: Crafted from A4032 aluminum alloy, offering a balance between strength and thermal expansion properties​
• Crown Volume: 10.8 cc​
• Piston Weight: Approximately 368 grams​
• Pin Specifications: 21.0 mm diameter, 60.0 mm length pins, each weighing 106 grams​
• Ring Specifications:
  • Top Ring: 1.20 mm x 3.05 mm​
  • Second Ring: 1.20 mm x 3.90 mm​
  • Oil Ring: 2.50 mm x 2.95 mm​
• Circlip Inner Diameter: 21.0 mm​

Design Highlights:

• Forged Construction: Utilizes a high-strength forging process, providing superior rigidity and resistance to high combustion pressures compared to cast pistons​
• Optimized Geometry: Features an oval barrel shape, calculated for optimal thermal expansion and piston movement, ensuring appropriate clearance and reduced friction​
• Valve Recess Design: Incorporates valve recesses capable of accommodating 1 mm oversized valves, offering flexibility for performance modifications​
• Thin Ring Design: Designed for use with thin piston rings, minimizing frictional losses and enhancing engine efficiency​
• Complete Kit: The set includes pistons, pins, clips, and rings, all designed to work harmoniously for reliable performance