DescriptionRK Autowerks Exhaust Cam Direct Injection UpgradeIncreases fuel flow from the HPFPEliminates fuel pressure drop at high RPM issue on high horsepower applicationsAllows you to run full E85S63TU4 cars onlyS63TU cars need our cams the BMW F90 high pressure fuel pumps (HPFP)Core Exhaust Cams RequiredOnly modification is the Direct Injection Lobe*Core Deposit Options:S63TU – $1500 – Refundable core depositS63TU4 – $2500 – Refundable Core Deposit$0 – Send your cams in before we ship our modified cams to you.Available For:S63TU:M5 | F10 | 2012-2016M6 | F06 F12 F13 | 2012-2019X5M | F85 | 2015-2019X6M | F86 | 2015-2019S63TU4:M5 | F90 | 2018 M8 | F91 F92 F93 | 2019 X5M | F95 | 2021 X6M | F96 | 2021 Warranty Info