N54 Build Questions.

Bars

New Member
Jul 15, 2025
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Hello. Finally bought 335i N54 6MT, going bottom mount single turbo right away. Been following this platform for years. Got some questions regarding parts and remote tuning. Maintenance is done. Engine is stock, going to build it once all plumbing, piping and tuning is done. IC are obvious choices so no questions there.

1) Currently looking into 4N EFR kits, probably going with 8474, any other good single turbo kits?

2) For fueling I want to keep DI and add PI, am I good going with Fuel-It! kits? Could I use PI plate with plazmaman intake manifold or I need to order it with additional rail? Which controller for PI?

3) Crankcase, looking at BMS low and high kits, any other recommendations?

4) Remote tuning, who should I contact for it? Any recommendations?

5) Coils and spark plugs, are OEM enough or I should upgrade to something else?

Any other recommendations and suggested parts add to the list?