BMW 114i 116i 118i F21 F20 Turbocharger Upgrade Cartridge. + High Quality Mounting Kit (Market value 110gbp). Please make sure part numbers from your old does match info in our advert. All car models listed can have several turbo options. Upgrade Stage 1. This Core has Top quality, aftermarket compressor wheel manufactured from solid (MFS) billet alloy via precision 5 axis CNC machine. The cold side wheel is the same size as original turbo but it is lighter and stronger wheel. It helps turbo spool up little bit faster. To get any power increase car needs to be Chip Tuned.