BMW E9x / E6x / E7x M57N2 upgrade turbocharger

Even though below listed models share the same engine the structure of these turbochargers are slighty diferrent. Order turbocharger according to your vehicle.

Stage 2 (HTD2872):

• Upgraded bearing system;
• CNC machined compressor housing;
• CNC machined turbine housing;
• OEM variable geometry nozzle;
• reinforced bigger machined from the solid compressor wheel – 50/72mm;
• bigger turbine wheel – 51/49mm;
• Flow bench adjusted;
• Balanced on VSR;

Power range: up to 400HP

Stage 2 (HTD2872BB):

• dual ceramic ball bearing;
•  CNC machined compressor housing;
• CNC machined turbine housing;
• OEM variable geometry nozzle;
• reinforced bigger machined from the solid compressor wheel – 50/72mm;
• bigger turbine wheel – 51/49mm;
• Flow bench adjusted;
• Balanced on VSR;

Power range: up to 400HP

Stage 3  (HTD3073BB):

• dual ceramic ball bearing;
• CNC machined compressor housing;
• CNC machined turbine housing;
• Custom variable geometry nozzle;
• reinforced bigger machined from the solid compressor wheel – 54/73mm;
• bigger turbine wheel – 58/54mm;
• Flow bench adjusted;
• Balanced on VSR;

Power range: 420+HP

Stage 4 (HTD3279BB):

• Big dual ceramic ball bearing;
• Enlarged shaft (6mm diameter ) and turbine wheel;
• CNC machined compressor housing;
• CNC machined turbine housing;
• Custom variable geometry nozzle;
• Reinforced bigger machined from the solid compressor wheel – 56/79mm;
• High flow design turbine wheel – 58/56mm;
• Flow bench adjusted;
• Balanced on VSR;

Power range: 470+HP 

Stage 5 (HTD3379BB):

• Big dual ceramic ball bearing;
• Enlarged shaft and wheel diameter 7mm;
• CNC machined compressor housing;
• CNC machined turbine housing;
• NEW design custom variable geometry nozzle with 14 nozzle blades;
• reinforced bigger machined from the solid compressor wheel – 56/79mm;
•  High flow design turbine wheel – 62.8/56mm;
• Flow bench adjusted;
• Balanced on VSR;

Power range: 500+HP

Please note that with upgrade turbocharger installed you will need engine tuning. 

Stage 3-5 turbochargers should be used only for professional use. Upgraded intake system as well as performance downpipe and custom software is required in order to achieve the best results.

When installing a new turbocharger we recommend to read our Installation guide.