Arashi TD05H-BIG16G-8CM Turbo for EJ20 & EJ25 SpecificationsThis Arashi turbocharger has been specially developed for Subaru EJ20 and EJ25 engines. Its power range is between 280 and 380 horsepower. It replaces the stock TD04L turbo (part no. 49377-04100 49377-04200 49377-04300 etc.). It features a CHRA (Central Housing Rotary Assembly) with journal bearing optimised by Arashi for superior performance.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 TD05H-BIG16G-8CM Turbo for EJ20 & EJ25 Technical DataApplication : Subaru EJ20 & EJ25 (Impreza WRX/STI GC GD)Horsepower : 280 - 380 hpCompressor wheel : 48.3 / 68 mm (11 blades)Turbine wheel : 49.2 / 55.8 mm (9 blades)Compressor housing : 0 77 A/R inlet 2.25 BIG16GTurbine housing : 0.57 A/R 8 cm2Bearing : journal 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