HKS 14001-AK077 GTII Symmetry Twin Turbo Turbocharger - Kit

The HKS 14001-AK077 is a high-performance symmetrical twin turbo kit from HKS, one of the most respected names in forced induction engineering. Part of HKS's acclaimed GTII Symmetry Twin Turbo lineup, this kit is engineered for V-type and horizontally opposed engines where a true left–right symmetrical turbo layout delivers optimal airflow balance, boost stability, and throttle response.

Why Symmetrical Twin Turbos?

The symmetrical twin-turbo concept — used on legendary F1 powerplants — is widely recognized as the ideal layout for V-shaped and flat engines. However, achieving true symmetry requires a matched pair of mirror-image turbines: one right-hand rotation and one left-hand rotation. Standard aftermarket turbos are exclusively right-hand rotation, making symmetrical setups nearly impossible — until HKS developed and manufactured their own in-house symmetrical twin turbine units.

Key Features:

• True Symmetrical Layout — Matched left- and right-hand rotation turbines for ideal airflow balance on V-type and horizontally opposed engines
• HKS GTII Ball Bearing Turbo Technology — Ball bearing center cartridge (CHRA) reduces rotational friction for faster spool-up and improved response
• Race-Proven Engineering — Derived from HKS GT800 and GT1000 full turbine kit programs, tested in competitive motorsport worldwide
• High-Flow Compressor Design — Optimized compressor and turbine wheel sizing for strong top-end power without sacrificing low-rpm response
• Durable Construction — Heat-resistant turbine housing and wheel materials engineered for sustained high-performance use
• Full Turbine Kit Configuration — Utilizes an external wastegate for precise boost pressure control at high power levels

HKS has been a pioneer in the Japanese aftermarket performance industry since 1973, producing the first commercially available aftermarket turbocharger for passenger vehicles and continuing to push the boundaries of forced induction technology. The 14001-AK077 reflects that legacy of precision engineering for enthusiasts and racers demanding the highest level of turbo performance.