Assuming you're LNF, to run full E85 you probably need the cams with the bigger fuel lobe as well as the Opel injectors, assuming you're at sea level.
If your car is pre 2010, you'd be wise to get upgraded injector seals (they do come with the Opel injectors).
Why can't you run E47? You don't need 93 octane necessarily. 91 is the highest I can get here and I run E47.
Black 2010 SS/TC – G85 | ZFR6758 | Term2 tuned | 479whp, 470wtq | Built internals | Cryo'd 4.45 | CM S4 clutch | Hahn CP | ZZP IC | Forge BPV | Hahn 3” DP and Catback | Hahn CAI | Ported head & intake | LE5 TB | Opel injectors + custom 5th injector | ZZP S3 cams | 82# valve springs | 420lph E85 LPFP | Custom FM oil cooler | PRS YYZ v3 & Koni yellows | PRS XXX bar | PRS rotated mounts, rear bushings & TCABS | PRS PCV | PRS Racing oil pan | PRS brake ducts