How do I measure Turbo inlet size??


New Member
Sep 19, 2006
When you look at the turbo from the front of the car, where is the INLET tube? I would guess it is the side that hooks into the air cleaner/CAI?? Trying to figure out the size of my turbo. Thanks!!
A turbocharger is constituted by 2 wheels on a common shaft, a compressor wheel and a turbo (aka expander) wheel.

The compressor wheel is the "cold" wheel - it operates in the aluminum cover on the ds of the car.

The turbo wheel is the "hot" wheel - it operates in the cast iron cover on the ps of the car.

The stock turbo, a Garrett TBO348, has a nominal 3" inlet (compressor inlet) and a nominal 2" outlet (turbo outlet).