I don't think it would fit that easily maybe with some modifications. This issue is brought up every now and then due to the different fuel injection system or something between the M103 and M104 engines.

Anyway, a 300CE in Singapore? I don't see many of those there (I used to live there). There were one or two 230CE (if they weren't both the same car), one W123 Coupe, and a lot a lot of 200E's heheheh

I'd love to see your car when I stop by again!

Good luck
-Holson-

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2008 BMW 335i Coupe