Yes, can support 600+ HP w/the correct mods from what the guy that specializes in these turbos.
This is what he emailed me.
" We can help you with your turbocharger without much fuss! Currently we offer the following upgrades for the 301 based unit:
60-1 compressor and Stage 3 turbine wheel, rated for 450+ HP, $850.00
60-1 billet compressor and Stage 3 turbine wheel, rated for 525+HP, $925.00
61.5 GT compressor and Stage 5 turbine wheel, rated for 475+ HP, $875.00
61.5 GT billet compressor and Stage 5 turbine wheel, rated for 550+ HP, $950.00
64mm billet GT compressor and Stage 4 (64mm) turbine wheel, rated for 625+ HP $1150.00"
MBHD
Are those 301 turbos decent? With the mentioned upgrades?