COBB TD05H-20G-8 Turbocharger - 400HP | 2008-2020 Subaru STI (E1120G)

Cobb Tuning
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TD05H-20G 400HP Turbocharger for 2008+ Subaru STi by COBB

The COBB TD05H-20G is an ideal turbo upgrade for those looking to increase the top-end power of their STI while maintaining low and mid-range response. Capable of producing 400hp and retaining excellent throttle response, the COBB 20G is a perfect turbocharger for street or track use!


  • Single Scroll exhaust housing
  • Offset compressor outlet for more room around the throttle by wire connector
  • Sleeve bearing turbo with 360 degree thrust bearings with modified oiling strategy for greater thrust capacity
  • Compressor: 52.5mm Inducer and 68mm Exducer
  • Turbine: 55.8mm Inducer and 49.2mm Exducer
  • 20G Compressor Housing with 68mm Billet Wheel
  • 8cm^2 Turbine Housing with 55.8mm Wheel (TD05H)
  • 640 CFM
  • 0.57 A/R
  • 1Bar Actuator


  • 2008 - 2020 Subaru STI

What's In The Box?

  • 1 - COBB TD05H-20G Turbo


  • COBB 1-Year Limited Warranty

Customer Reviews

Based on 1 review
Cobb 20g......2010 Subaru Wrx

Absolutely Happy.......
This turbo made fantastic numbers.......
On 92 pump fuel it made... 375whp 365torque
On E85 pump fuel it made...400whp 395torque on a mustang dyno... 455whp 450torque on dyno jet...The install was a little tricky but with the help from a professional and my tuner (#Stevetune) we got it done.💯 to the results and cobb thx Maperformance