HKS Twin Turbo GT III RS SPORTS TURBINE KIT For Nissan RB26DETT 11004-AN012

Serious RB26DETT builders eventually hit the ceiling of the factory twin turbos. The HKS RB26 Twin Turbo GT III RS Sports Turbine Kit (11004-AN012) is a premium direct-upgrade solution that pairs MHI CHRA cores with HKS’s advanced custom housings and high-efficiency turbine blades. The result is a surge-free, highly responsive twin-turbo system with strong low-to-mid range boost and excellent top-end power, all while maintaining strong reliability under high-boost conditions.

This GT III RS kit is engineered for maximum versatility and modern performance demands — delivering quick spool, minimal surge, and outstanding durability. It fits a wide range of RB26-powered vehicles and comes complete with the matched turbos plus all essential installation components: exhaust gaskets, pipe gaskets, oil inlet and outlet pipes, and water cooling lines. Note: Not compatible with HKS extension kits (1418-RN005 or 1418-RN011).

At Terra Firma Automotive, we supply this genuine HKS GT III RS Twin Turbo Kit — a top-tier Japanese-made upgrade trusted by serious Skyline and Stagea builders.

• GT III RS twin turbo system with MHI CHRA and HKS proprietary housings
• High-efficiency design prevents surging while providing rapid boost response
• Strong low-to-mid torque with excellent high-RPM power delivery
• Optimized turbine blades and housing geometry for superior airflow
• Fits Nissan Skyline GT-R R32 (BNR32), R33 (BCNR33), R34 (BNR34), and RB26-powered Stagea 260RS
• Includes full hardware set: exhaust gaskets, pipe gaskets, oil & water lines
• Supports high-horsepower builds while retaining excellent drivability
• Made in Japan with HKS’s proven turbo engineering expertise
• Direct upgrade for built RB26DETT engines
• Not compatible with HKS extension kits (1418-RN005 / 1418-RN011)
• ⚠️ 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.