Supertech 87mm Bore Piston Rings RB26DETT GNH8700

RB26DETT engines in the R32, R33, and R34 Skyline GT-R benefit from upgraded piston rings when running high boost, high RPM, or stroker configurations. The Supertech 87mm Bore Piston Rings (GNH8700) are a high-performance upgrade featuring a gas-nitrided design with precise dimensions (1x3.30 / 1.2x3.60 / 2.8x3.30mm) that deliver superior sealing, reduced friction, and exceptional durability. These rings are specifically matched for use with Supertech 87mm pistons (P/N RB26-87-CR8.5-H13), ensuring optimal ring-to-piston clearance and long-term reliability under extreme conditions.

The gas-nitrided construction provides excellent wear resistance and heat dissipation, helping maintain compression and oil control even in high-power applications. This results in more consistent power delivery, reduced blow-by, and improved engine efficiency across the RPM range. Whether you’re building a street monster, track car, or drag setup, these rings are a critical component that supports the increased demands of modified RB26DETT engines.

At Terra Firma Automotive, we supply these genuine Supertech 87mm Bore Piston Rings as a premium upgrade for RB26DETT builders seeking maximum sealing performance and durability. They are an essential part of any serious piston and ring package, helping unlock reliable power while protecting your engine investment. For enthusiasts serious about optimizing their RB26 for high-boost and high-RPM use, these Supertech rings are one of the most effective upgrades you can make to your Skyline.

 

• Supertech 87mm Bore Piston Rings for RB26DETT
• Gas-nitrided high-performance ring set (1x3.30 / 1.2x3.60 / 2.8x3.30mm)
• Matched for use with Supertech 87mm pistons (P/N RB26-87-CR8.5-H13)
• Superior sealing and reduced friction for consistent compression
• Excellent wear resistance and heat dissipation under high boost/RPM
• Ideal for high-power, stroker, and aggressive RB26DETT builds
• Reduces blow-by and improves oil control
• Enhances overall engine efficiency and power delivery
• Premium Supertech engineering with proven real-world results
• Critical component for reliable high-performance piston assemblies
• Supports increased boost and RPM demands
• Direct upgrade for R32, R33, and R34 GT-R engine builds
• Helps maintain long-term engine health and performance
• Trusted by professional RB26 builders for quality and durability
• Essential for optimizing compression and ring seal in modified engines
• ⚠️ Emissions / California Legal Disclaimer – Off-Road / Competition Use Only: This product is intended for off-road, competition, and track use only. It is not legal for sale or use on public roads or highways in California (or any other CARB-adopting state). For more information Click Here.