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Garrett GTW 3684R

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Garrett's new GTW3684R dual ball bearing or journal bearing turbocharger. Equipped with an ultra high flow compressor wheel featuring Garrett 8-Blade technology, 4" compressor housing Inlet and 2.5" Outlet With Built in Anti-surge Machining and improved shroud design for Surge Resistance.


Compressor Specifications

  • Compressor Wheel Exducer: 84mm
  • Compressor Wheel Inducer: 62mm
  • Compressor Wheel Trim: 54
  • Compressor Housing A/R: 0.70 A/R
  • Max Flow Rate: 74 lb/min
  • Max Recommended Turbo Shaft Speed: 130000 RPM
  • Compressor Housing Connections:
    • Inlet: 4.0″ Hose Coupler
    • Outlet: 2.5″ Hose Coupler


Turbine Specifications


  • Turbine Wheel Inducer: 71
  • Turbine Wheel Exducer: 62
  • Turbine Wheel Trim: 76
  • Turbine Housing: T4 In, V-Band Out EWG, Optional A/R



  • Ported Shroud Designed for Surge Resistance
  • Availablle in both Hydrodynamic Journal Bearing and Dual Ceramic Ball Bearing options
  • Forged Fully Machined Billet Compressor Wheel
  • Twin-Scroll Turbine Housing
  • Lightweight Aluminum Backplate


About Garrett® GTW Series Turbochargers

Garrett® GTW Series Turbochargers were designed to provide budget-minded enthusiasts with a high-performing mid frame product offering available in ball bearing and journal bearing options.

The fully-machined billet aluminum compressor wheels provide optimal horsepower range and boost response. Ported shroud compressor housings increase surge resistance and provide reliable, continuous power throughout the power band. A lightweight aluminum backplate comes standard on all GTW turbochargers and reduces overall weight.

The water cooled CHRA keeps housing temperatures to a minimum. The GTW3476 and GTW3884 turbine wheels are constructed from Inconel, a Super Alloy that maintains strength during prolonged exposure to high exhaust gas temperatures. Turbine kits are offered in open volute and twin scroll, and a variety of A/R and flange configurations. The GTW is a cost effective option for enthusiasts looking to turbocharge their vehicles.