Turbosystems upgrade turbocharger set STAGE 1 kit for BMW M57D30TÜ2 features: 
 
KP39 turbocharger:
fitted reinforced thrust bearing;
reinforced impeler and turbine wheel;
compressor wheel replaced with machined from the solid to hold high loads on 3 bar boost and above;
refurbished housings;
new shaft;
balanced on VSR;
 
K26 turbocharger:
fitted reinforced 360° thrust bearing;
reinforced bigger machined from the solid compressor wheel;
bigger high flow turbine wheel;
refurbished housings;
new shaft;
balanced on VSR;
 
Power range: 420+ HP;
 
Turbosystems upgrade turbocharger set STAGE 2 kit for BMW M57D30TÜ2 features: 
KP39 turbocharger:
fitted reinforced thrust bearing;
reinforced impeler and turbine wheel;
compressor wheel replaced with machined from the solid to hold high loads on 3 bar boost and above;
refurbished housings;
new shaft;
balanced on VSR;
 
K26 turbocharger:
dual ceramic ball bearing to eliminate turbo lag between K26 and KP39 spools due to bigger compressor and turbine wheels;
reinforced bigger machined from the solid compressor wheel;
bigger turbine wheel;
refurbished housings;
new shaft;
balanced on VSR;
 
Power range: up to 500HP;
BMW 3-Serie E90/E91/E92/E93 335D
BMW 5-Serie E60/E61 535D
BMW 6-Serie E63/E64 635D
BMW X3 E83 30D
BMW X5 E70 30D
BMW X5 E70 35D
BMW X6 E71 30D