cracks me up, oh its a "fake" T4 or "T4 is this or that"



T4 is just a VERY VERY vague description of what id expect is about 80% of all turbos that have ever existed, ever.
Millions of variations.

The "B" "E" etc etc after T4 is just the compressor inlet and outlet size designation too, could be on millions of em.

christ, look at the current retro ford, cortina pinto turbo in there with a "t4" that is smaller than most peoples "t3" turbos...


Roosie- Thats a T4 type compressor and a large T3 exhaust housing, like many small "t4s", but its not exactly like a RS500 T4, no.

wether its better, worse, what, dunno, didnt look into it.

what ".63" housing you got? EscCos T34 one? RS500 T4 one? Dumper truck T6 one? all ".63" is is a ratio between wheel and housing size, the wheel being the one they EXPECT to be fitted with that housing, so if you dont know what the original wheel was, it dont mean loads.
RS500 T4 .63 housing is bigger than EscCos one...