Performance Pistons for Saab & Opel 2.8T V6 (A28NET / Z28NET / B284)

These high-performance pistons are designed for the Saab and Opel 2.8T V6 engines with engine codes A28NET, Z28NET and B284. They are a strong and reliable replacement for the original pistons and are ideal for engine rebuilds, performance upgrades and high boost applications.

Compared to standard factory pistons, these upgraded pistons are better suited to handle increased cylinder pressures and higher engine loads, making them suitable for tuned or modified engines.

Vehicle Fitment

• Saab 9-3 – 2003–2012 (2.8T V6 B284)
• Saab 9-5 – 2011–2012 (2.8T V6 B284)
• Opel / Vauxhall Insignia – 2.8 Turbo (A28NET)
• Opel / Vauxhall Vectra C / Signum – 2.8 Turbo (Z28NET)

Technical Specifications

• Engine codes: A28NET, Z28NET, B284
• Piston type: Performance replacement piston
• Available bore sizes:
  • 89.0 mm – Standard bore
  • 89.5 mm – Oversize (+0.5 mm)
• OEM compression ratio reference: 9.5:1
• Application: Saab / Opel / Vauxhall 2.8T V6 engines

OEM Piston Reference Numbers

The following OEM piston part numbers are listed as a reference for compatibility:

• 92068444 – OEM piston standard size
• 92068445 – OEM piston oversize

These pistons are ideal for engine rebuilds, performance builds and applications where increased reliability under higher boost pressure is required.