The PT54 IS a TE-61
they just changed the name ... if you go to precisions website you will see that the Te-61 is no longer listed the 54 took its place
there is a PT61 but that is an entirely different turbo.
This turbo has less than 1K miles on it...I found the limit of it quickly on my combo.
I have a full weight T-type and have ran a 6.77 @102.3 on drag radials with this turbo.
$500