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Garret Turbo Model Numbers Explained.

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GT Models explained

GT Models use a new naming system. The new system was introduced as an easier identification of the turbo's characteristics.

New models can have up to 10 digits, that specify its range, measurement of the compressor wheels and the rest of the turbo's characteristics. The old naming system is obsolete.

Example G T 3 2 7 1 B F

Digits 1 2 3 4 5 6 7 8 9 10

Digits Used

1-2 Should always be GT

3-4 Range denomination ( based on the size of the turbine wheels and the turbine housing)

5-6 Corresponds to the diameter of the compressor wheel in mm ( In the event that the wheel is bigger than 100mm only the last two figures are used )

7-10 These are used to designate the specific characteristics of each model, according to the following table:

A Variable nozzle turbochargers (VAT) N Imitation shroud wheel

B Compressor wheel without nuts O

C Ceramic turbine P Variable nozzle turbochargers (VNT OP)

D A double hole in the turbine housing bypass Q

E Adapter integrated into the turbine housing R Ball bearing turbos

F Carbon seal S A single hole in the turbine housing bypass

G Recirculation Actuator T Titanium-aluminum turbine

H Separate manifold adaptor U

I Manifold elbow and turbine housing integrated V Variable nozzle turbochargers (VNT)

J W Refrigerated turbine housing

K Turbo assisted hydraulic X

L Body refrigerated by water. Y

M Manifold and turbine housing integrated Z Compact

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