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Whilst I feel for Vintage, this is a good warning to everyone:
REMOVE ALL MODS BEFORE going into the dealer for a service etc. Having read the other N54 forums, BMWNA are really nitpicking over mods to the N54-engined cars. Especially over the HPFP issue. I read a while ago a poster dismissing the HPFP issue as minor these days, but it really doesnt seem that minor and BMW are looking for anything as a scapegoat if you have the problem - ie: any power-enhancing mods! Don't give them an excuse.
Also purchasing a BT tool if you have a JB3 etc to clear related codes is a good idea too. You don't want BMW to use these codes to invalidate any warranty on future engine-related issues you may have.
And Silverbullet is correct, the FMIC will basically allow more power output due to better cooling and better flow than the stock IC.
HPFP failures have happened on many stock cars, so *we* know it's not your mods...but BMWNA...
Goodluck Vintage anyway with your case.
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