These Units are exchangeunits. It means you must return your old units. !
Bolt-on BMW upgrade turbocharger set for BMW BMW M2 competition / M3 / M4 models. Easier power gain and better spool. Comes in two options – Stage 1 and Stage 2. Stage 1 kit is designed to work with stock exhaust manifold and other engine units. Our upgrade intake pipes kit required with Stage 2 kit. Specifications and compatibility list written below.
STAGE 1 Turbosystems upgrade turbocharger set for BMW BMW M2 competition / M3 / M4 S55 features:
reinforced enlarged machined from the solid compressor wheels;
larger turbine wheels;
Refurbished housings;
New shafts;
Balanced on VSR;
Power range: up to 700HP
STAGE 2 Turbosystems upgrade turbocharger set for BMW BMW M2 competition / M3 / M4 S55 features:
Upgraded bearing system;
reinforced enlarged machined from the solid compressor wheels;
larger turbine wheels;
Refurbished housings;
New shafts;
Balanced on VSR;
Power range: up to 750HP