Arashi TD06H-20G-8CM Turbo for EJ20 & EJ25 SpecificationsThis Arashi turbocharger has been specially developed for Subaru EJ20 and EJ25 engines. Its power range is between 400 and 550 horsepower. It replaces the stock TD04L turbo (part no. 49377-04100 49377-04200 49377-04300 etc.). It features a KBT CHRA (Central Housing Rotary Assembly) which is a TD journal bearing assembly converted to a ball bearing one (with the addition of a restrictor). This turbo therefore combines all the advantages of both systems.This water and oil cooled turbocharger features a machined aluminium compressor wheel which is significantly stronger than a conventional cast wheel. Each Arashi turbocharger is individually balanced under high RPM to eliminate vibration reduce whistling and ensure excellent sealing.Arashi TD06H-20G-8CM Turbo for EJ20 & EJ25 Technical DataApplication : Subaru EJ20 & EJ25 (Impreza WRX/STI GC GD)Horsepower : 400 - 550 hpCompressor wheel : 52.5 / 68 mm (11 blades)Turbine wheel : 58.8 / 67.1 mm (9 blades)Compressor housing : 0 77 A/R inlet 2.25 20GTurbine housing : 0.57 A/R 8 cm2Bearing : ceramic ball bearingCooling : water and oil cooledFlange : standard Subaru single scrollActuator (adjustable) : pre-installed 1.1 bar spring (range 0.2 - 1.79 bar)Includes : gaskets extra springs and install kit