So i’ve been waiting for a while to get my hands on a T28R so I can finally compare. I’ll list my results below.

The only differences that I can confirm (update me if I’m missing any) is that the 28r has a 6 bolt exhaust housing vs 28 having only 4. 28r’s are still prone to cracking around the flap just like 28’s.

The 28r has a ball bearing cartridge vs 28 being journal bearing.

The inducer of the compressor wheel being smaller on a 28r vs 28.



T28 (GT2560)
Inducer - 46.6mm
Exducer - 60mm

T28R (GT2560R)
Inducer - 45.5mm
Exducer - 60mm

Turbine wheels are identical.
Exhaust housings are identical (.64ar)
Compressor housings are identical too.







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