I asked ZF if they had some advice for us tuned 335i owners. This is what they said.
"Many Thanks for your enquiry.
Please be advised that we are unable to give advice regarding a car that is “non standard”. We cannot comment on recommendations for any particular transmission “upgrade” to match your re-tuned, uprated engine.
We only know the transmission part numbers for the standard applications – ZF do not have a department for non standard applications.
I am sorry I am not able to be of more help regarding your enquiry."
Vargas S2 turbos|VAC S3 Cylinder head|RR DPs|RR MPs|Supersprint X pipe|Remus Quad Sport mufflers|aFe Stage 2 Si with scoops|Forge DVs|ER CP|BMS meth elbow|Aquamist HFS-4|Walbro 450 E85 LPFP|AA FMIC|BMS OCC|Cobb stage2+ agressive FMIC LT|P3 Boost Gauge|JIC CROSS Competition Coilvers|M3 sways F/R+ Ground control endlinks|Vorsteiner v303 19"|Michelin PS2 sport|Quaife LSD|Vorsteiner V35 CF hood|CF CLS trunk|Duke Dynamics quad diffusor