What's up with your 4.6 motor?

I would think the block and most of the accessories would be nearly identical on both motors, the tune would be different though.

Depending on what kind of parts you need, maybe there is something aftermarket available? ie; pistons, rods, valvetrain

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2002 X5 4.6is - Titanium Silver / Black Alcantara - Dinan Stage 2 - Bilstein/Eibach - Brembo BBK ----SOLD---
1993 318i - Brilliantrot / Tan - bone stock daily driver