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A while back Garret changed the naming of there turbo's to add the rear housing size into it.

My turbo is actually a GT3540r but if you were to buy one now its a GT3582r because its got a .82 rear housing on it.

Same turbo's just different rear housings so check which rear housing it has on it. the gt3540r may even have a 1.06 rear instead of a .82 so then its not a GT3582r equivalant.

if you get what i mean

Whats the difference between the Garret's GT3582R and GT3540R?

I've been looking up Garret's website and far as i can tell, they have info for GT3582R but nothing on GT3540R..

I'm not going to debate that one but from all my sources .

Garrett was having trouble with turbocharger identification because their previous handle GT3540R tells you turbine series "GT35" with compressor series "GT40" or just 40 . "R" means rolling element or ball bearings .

Where this system falls down is there may be several different major or outside diametre types of GT40 compressor which there is - 82mm and 88mm . So they changed their naming system to turbine series "GT35" and compressor outside diametre (OD) in mm ie "82" and the "R" stayed the same . So GT3582R is the current name for that turbocharger . They can and have been called GT35R/GT3540R/GT3582R , all same thing .

The system is still flawed because you can have different famillies of compressor in the same or very similar OD , this is how people confuse the real GT3076R turbos with the hateful GT30/TO4S turbos . Their compressor wheels are within 0.1mm and the trim size numbers the same . Buyers MUST find the part numbers for the turbos they want and not get "substitutions" because seemingly minor differences are not trivial . Search turbobygarrett site for the unit and cartridge (CHRA) pt no's , don't have time to find them ATM .

Cheers A .

I'm not going to debate that one but from all my sources .

Garrett was having trouble with turbocharger identification because their previous handle GT3540R tells you turbine series "GT35" with compressor series "GT40" or just 40 . "R" means rolling element or ball bearings .

Where this system falls down is there may be several different major or outside diametre types of GT40 compressor which there is - 82mm and 88mm . So they changed their naming system to turbine series "GT35" and compressor outside diametre (OD) in mm ie "82" and the "R" stayed the same . So GT3582R is the current name for that turbocharger . They can and have been called GT35R/GT3540R/GT3582R , all same thing .

The system is still flawed because you can have different famillies of compressor in the same or very similar OD , this is how people confuse the real GT3076R turbos with the hateful GT30/TO4S turbos . Their compressor wheels are within 0.1mm and the trim size numbers the same . Buyers MUST find the part numbers for the turbos they want and not get "substitutions" because seemingly minor differences are not trivial . Search turbobygarrett site for the unit and cartridge (CHRA) pt no's , don't have time to find them ATM .

Cheers A .

I recently bought a GT3076R (a few weeks ago) and they have a GT3037R badge on them, so even though you order under the new system it still may be badge as per the old system.

Edited by AWD2Go

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