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N51 SULEV v N52
This is from the Bimmerforums:
"The N51 has a different cylinderhead with lower compression, a plastic cylinderhead cover with a different crankcase ventalation valve, a DISA intake manifold, and different cats. The performance should be nearly identical."
I cannot confirm this but I also heard the DME is de-tuned compared to the N52's.
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