RB26DETT engines in the R32, R33, and R34 Skyline GT-R require high-quality pistons when pushing for higher power, better reliability, or optimized compression. The Supertech 87mm Bore Pistons (P6-RB26-87-CR8.5-H13) are a premium upgrade featuring an 8.5:1 compression ratio and +15.5cc dome design, engineered to handle the stresses of high-boost and high-RPM applications. Crafted from enhanced 4032 alloy with additional Cu, Ni, and Mg, these pistons offer low thermal expansion, excellent wear resistance, and high thermal conductivity, allowing them to withstand extreme conditions such as 42psi of turbo boost with alcohol without issues.
Supertech’s multi-step forging process creates a fine structural grain that aligns fibers with stress directions, followed by multiple heat treatments for even hardness and high tensile strength. Each piston is CNC machined to precise tolerances for optimal ring groove perpendicularity and flatness, ensuring superior sealing and longevity. The 30mm compression height and 21mm pin diameter make them a direct fit for standard RB26DETT builds, delivering efficient power production and reduced piston slap.
At Terra Firma Automotive, we supply this genuine Supertech 87mm Bore Piston Set as a trusted choice for RB26DETT builders seeking precision, strength, and performance. Made with over 40 years of racing experience, these pistons deliver the reliability and consistency needed for both street and competition use. For enthusiasts serious about optimizing their RB26 for high-boost and high-RPM use, this Supertech piston set is one of the most effective upgrades you can make to your Skyline.
- Supertech 87mm Bore Pistons for RB26DETT with 8.5:1 compression ratio
- Enhanced 4032 alloy with Cu, Ni, and Mg for low thermal expansion
- +15.5cc dome design for optimized combustion
- Multi-step forging and heat treatment for high tensile strength
- CNC machined to precise tolerances for ring groove accuracy
- Balanced design for smooth engine operation
- 30mm compression height and 21mm pin diameter
- Supports high-boost applications up to 42psi with alcohol
- Ideal for high-RPM and high-power RB26DETT builds
- Direct upgrade for R32, R33, and R34 GT-R engines
- Premium Supertech engineering with proven race heritage
- Enhances power potential and engine durability
- Trusted by professional builders for quality and performance
- Essential component for optimized RB26 builds
- ⚠️ 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.
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