[enjoythemusic]

BM3 with larger than Dinan turbo plus e85 is the sweet setup it seems if you don't care about warranty and the added stress on the engine/tranny/etc.

Going from Dinan Stage 2 to Stage 4 on the N55 453i did FEEL a bit less strong due to the way the power is delivered. Dinan Stage 2 has lots of low rev grunt, yet falls over itself at higher RPMs, whereas Stage 4 has low rev pull, yet maybe a touch less yet pulls hard all the way to the top rev range. JMHO and how it FEELS to me on the N55 engine 435i. Have about two years left on warranty and so like keeping that. Once warranty is done, then other options are on the table