Tomei ARMS MX8265 Turbocharger - Subaru WRX 2002-2007 / STI 2004-2021, 2005-2009 OBXT (STI-style intercooler/piping required)

Part number: TB401A-SB01C

This Tomei MX8265 turbocharger is rated at 450hp and is a direct bolt on for ALL EJ ENGINES! This unit comes with all gaskets, lines and fittings needed for install. 

IF YOU HAVE A 2008-2014 WRX OR 2005-2009 LGT, you'll need to either have an STI intercooler, FMIC or Verticooler as this turbocharger uses the STi style compressor outlet.

Key Points:

-Full floating journal bearing

-CNC billet A2618 aluminum 6 blade compressor wheel

-54.8mm compressor inducer/76.2mm exducer

-Nickle based cast alloy K418 steel 11 blade turbine wheel

-58.8mm turbine inducer/67mm exducer

-.57 A/R turbine housing

-Multi-rate billet wastegate actuator pre-loaded with 14psi spring(s).

-6 wastegate actuator springs included

-Aftermarket silicone turbo inlet require (Did you know our friends at Tomei make those too?

Additional info:

• Journal bearing
• Compressor wheel inducer: 54.8mm
• Compressor wheel exducer: 76.2mm
• Compressor wheel trim: 52
• Compressor wheel blades: 6
• Compressor housing inducer: 55.8mm
• Compressor housing exducer: 41.5mm
• Compressor housing A/R: 0.78mm
• Turbine wheel exducer: 58.8mm
• Turbine wheel inducer: 67.0mm
• Turbine wheel trim: 77
• Turbine wheel blades: 11
• Turbine housing inducer: 45.0mm
• Turbine housing exducer: EJ
• Turbine housing A/R: 0.57mm

NOTE: A silicone inlet hose is needed when using this turbo as the inlet is slightly larger than stock.

What does this all mean?

If you have a Subaru equipped with an EJ205/EJ255/EJ257 and want more pep than the factory shmol boi can make, this unit is a solid upgrade. It’s a direct bolt on replacement, meaning it will bolt in/out just like the OE shmol boi does. But, keep in mind you’ll need to upgrade your fuel system accordingly so you don’t melt stuff. Oh, and you'll want a built bottom end to handle the amount of torque this medium boi can make. If you don’t know what you need to make this turbocharger work, shoot us a message on the website or email

Outback Fitment: 2005–2009 Subaru Outback XT (2.5L turbo), with compatible STI-style intercooler/piping.