Stock N18 Cooper S.

What is the best upgrade for some color / performance / spark over stock? Was told to only use OEM Delphi is there not anything better?

 

Unless you go tuned, stick with OEM replacement plugs. I prefer NGK, but only buy from NGK directly. (Too many counterfeit)

For coils, I had good success with the Bavarian Autosport brand from ECS
https://www.ecstuning.com/b-bavarian...coil/5005~bav/

 

So, to be clear, the N18 doesn't have a coil and ignition wires, it has four individual coil-on-plug modules (or coil packs). There's probably no advantage to upgrading them.

 

Glad to hear that as that's what I just ordered. Had a Bosch one crap out on me yesterday with 24k miles and a bit under 3 years so now I've got a crap duralast one in til the replacements come as I no longer trust the other 3 bosch's.