M7655
Without losing mid range speed transient characteristics, the boost will reach the 4500rpm range with ease. Even from there, it can suddenly spool up to higher rpm range without losing boost. Delivers vicious acceleration that is what RB26 owners want to have.
Part number: 173021
 
M8260
This is the largest size bolt-on turbo for this output characteristics at engine speeds. Reaches full boost at around 5000rpm at somewhat higher range, but from there achieves fierce acceleration with the output characteristics that almost makes you forget that it is a bolt-on turbo.
PART NUMBER: 173022