Originally Posted by
Karlos G
Max flow rates, spool up characteristics, longevity....
Rough guide...
Stage 1 just has greater longevity than a stock item, pointless upgrade IMO unless you run standard power! (.36/42)
Stage 2 has greater longevity and a larger compressor (.36/55)
Stage 3 has greater longevity and a larger compressor and larger exhaust housing (.48/55)
Oh I'm pretty sure mine has a .48 housing, will check tomorrow.