Gt30 gt3037 universal turbo with 1m 0.55m oil feed return hoses and fittings January 15, 2024gt30055m, feed, fittings, gt30, gt3037, hoses, return, turbo, universaladmin Very Good response turbo for 6 Cyl applications. This turbo has a flow capacity of about over 500HP. Horse Power: Boost Horse Power up to 500BHP. Thrust bearing: 270 Degrees. Oil Inlet: M12 1.25 & 2 M8 1.25.