Our line of S400 turbo's futures a ton of upgrades over your factory box style turbo. This unit is a S475/96 with choice of turbine housing.
Some of the upgrades follow below:

• 6 blade 75mm x 101mm high flow billet compressor wheel
• 10 blade 96mm x 88mm high flow turbine
• V2 race cover standard
• 360 thrust bearing
• T6 turbine housing

These units are designed off of the factory part number of part number 171702.

1.15 A/R is quicker spooling.

1.32 A/R is factory standard and is what will be included if other options aren't chosen.