RB26DETT engines in the R32, R33, and R34 Skyline GT-R offer exceptional tuning potential, but the factory twin-turbo system often becomes a limitation as power levels rise. The HKS GT III SS Sports Turbine Kit (11004-AN011) is a refined twin-turbo upgrade that pairs MHI CHRA cores with HKS custom housings and advanced turbine blades. This combination delivers surge-free boost, rapid response, and smooth power delivery across the RPM range, making it an excellent choice for enthusiasts who want strong mid-range torque without sacrificing drivability.
The GT III SS version emphasizes quick spool and linear power with an enhanced actuator preset at 88.3 kPa (0.9 kgf/cm²). It includes a complete hardware package: exhaust gaskets, pipe gaskets, oil inlet and outlet pipes, water cooling lines, and the upgraded actuator for stable boost control. The thrust bearing design further improves throttle response, while the high-efficiency layout minimizes surging even under aggressive tuning. This kit is not compatible with HKS extension kits (1418-RN005 or 1418-RN011) and is optimized for direct replacement in factory twin-turbo configurations.
At Terra Firma Automotive, we supply this genuine HKS GT III SS Twin Turbo Kit as a premium Japanese-made upgrade for serious RB26DETT builds. It transforms the factory twin-turbo character into a more responsive and capable system while upholding the reliability and engineering excellence HKS is known for. For enthusiasts seeking refined twin-turbo performance with strong low-to-mid range torque and excellent street manners, this GT III SS kit is one of the most balanced and effective upgrades available for the legendary RB26 platform.
- HKS GT III SS Sports Turbine Kit for RB26DETT
- MHI CHRA cores with HKS custom housings and advanced turbine blades
- Thrust bearing design for quick throttle response
- Enhanced actuator preset at 88.3 kPa (0.9 kgf/cm²)
- High-efficiency layout minimizes surging
- Strong low-to-mid range torque with smooth power delivery
- Includes full installation hardware: gaskets, oil & water lines
- Direct upgrade for R32 (BNR32), R33 (BCNR33), and R34 (BNR34) GT-R
- Excellent balance of street drivability and track performance
- Premium HKS engineering with latest turbo technology
- Supports high-output twin-turbo RB26 builds with reliability
- Not compatible with HKS extension kits (1418-RN005 / 1418-RN011)
- Transforms factory twin-turbo response and power delivery
- Trusted by RB26 enthusiasts for performance and durability
- ⚠️ 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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