Stage III Ceramic GT35 GT3582R Ball Bearing Turbo Charger T4 0.68AR Ball Bearing GT35 GT3582R Turbo Charger , Stage III Ceramic Ball Bearing on Compressor Side .70 A/R Compressor Housing , .68 A/R Turbine Housing For Super Fast Spool T4 Flange to Manifold Works for Many Bigger HP Applications, 400-600 HP, Professional Installer Is Highly Recommend