It would be a very good housing for a 25. I always reckoned that the .63 from garrett is too small, the .68 from hks is a little bit to small, the .82 from garrett is a little bit too big, and the hks .87 is too big for a road based skyline. I won’t even mention the 1.06 from garrett, its really for specialist applications. The 0.73 housing that AVO is making falls into that sweet spot and I think it would be well suited to the RB25 motor,
HKS 3037s
COMPRESSOR:
-Wheel- 56 Trim - 57.0 Inducer / 76.2 Major
-Housing- 100 Inlet / 50 Outlet - 0.60 A/R
TURBINE:
-Wheel- 84 Trim - 60.0 Major / 55.0 Exducer
-Housing- T3 inlet / External GT-Pro outlet; 0.68, 0.87 A/R
GT3076R
COMPRESSOR:
-Wheel- 56 Trim - 57.0 Inducer / 76.2 Major
-Housing- 0.60 A/R
TURBINE:
-Wheel- 84 Trim - 60.0 Major / 55.0 Exducer
-Housing- T3 inlet / External outlet; 0.63, 0.82, 1.06 A/R.