This is a Comp Turbo "CT-43 6767 TRIPLE BALL BEARING Series Billet Turbo with a T4 4 bolt flange" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. The CT-43 Turbo with CT 76 Billet compressor wheel and a BULLET to distribute the air properly, full billet CNC center section and HE75 light weight 10 blade Turbine wheel. It has a 4" intake and a 3" outlet. This turbo is good for anywhere from 500-950HP. This turbo has a TRIPLE ball bearing configuration (the only Turbo on the market with this technology) and is also equipped with a .96 exhaust housing and a anti-surge compressor housing.
Please note, all turbos with billet center sections require a -10 AN fitting oil return kit.