HKS GTIII-4R A/R 0.81 WG Turbo With T4 Flange 14001-AK033

by HKS
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SKU 14001-AK033

This is a special order item and could take a while to arrive. Please contact us for lead time before ordering. 

GTIII-4R A/R 0.81 WG 14001-AK033 Turbo Flange: T4


GT III Turbine Series

The aluminum forged impeller allows achieving high boost at low airflow ranges whilst surging is prevented. HKS designed housings that utilize the technology, experience and know-how built up over many years of turbocharger innovation.  This original design improves turbine efficiency and minimizes surging. The combination of the ultimate turbine blades and its optimal housing creates an amazingly versatile turbo. The turbine efficiency enhancement makes this orthodox floating metal type turbine comparable to a ball bearing type.
Recent requirements towards fuel efficiency and emissions control have accelerated the development of turbo technology and this has been adapted for tuning. GTIII turbine series are combined with MHI brand CHRA made with the latest technology.  

Code No. 14001-AK033




【Variable Ported Shroud 】
※Ported shroud functions depending on the bolt's position.
※When surge occurs due to the vehicle specification, ported shroud is able to prevent surging.
  • A successor model of TO4Z. Compact in size, but withstandable over 700PS.
  • Highly reliable MHI high-performance CHRA & highly durable aluminum forged impeller are well-balanced.
  • Ported shroud function is selectable using an adapter.
    Replacing the position of the bolt securing ported shroud is able to keep the intake air path to reduce surging.
  • Impeller wheel rotation sensor compatible. (The sensor will be available separately.) 
  • Easy replacement with TO4Z series turbine and the turbo kit using TO4Z.
    (Oil inlet/outlet are designed for GTIII-4R).
    * Water cooling line is not available.
【Engine Output & Boost】



  • The graph above shows the result of in-house testing.
  • The actual results may vary depending on each vehicle's specification(s).
  • This turbo is universal. Please verify that this will work with your set up before purchase.
Product Spec Code No. Price Remarks
GTIII-4R A/R 0.81 WG 14001-AK033 Turbo Flange: T4

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