Wow I never expected your response to make the pic in my mind of s6 turn into what it just did lmao . I felt like 2016 was goldilocks yr too . I really would love v10 m5 but I should get something good in snow maybe I should look at diesel 5 series. Those s55 cars tho make some STUPID power lol. Im so lost
Last one I promise any thoughts on 2016 550xi fully loaded like b and o radio exec pack all driver assist packs and 44k miles with 11 months left on warranty for 31k i think im gonna bite as that yr should be good right. I know 17 has better idrive and new platform
Its funny you mention those two cars - I've always loved and wanted an e60 M5, and WILL own one someday. Right now I could literally pay cash for most of the ones that pop up on cars.com near me, but I need a car for the winter since my N54 is now a car clearly geared as a track weapon and even when I was just FBO it didnt work in the Chicago winters without trying to kill me at least 3x/year.
I've been looking at 14-17 550i xdrives lately and will also probably bite on one of those. The N63TU seems to have fixed 90% of the issues with the original N63 - or at least all the serious and expensive ones or engine replacement level failures - but theres very very very little aftermarket support right now. You can buy DPs, intakes and a tune right now plus theres 2 or 3 options for hybrid turbos if M5 turbos wont at least bolt up to the N63TU manifold (VTT stage 1, Pure stage 1 and 2 - if S63TU M5 turbos at least bolt on which I expect they would and you just wouldnt have the twin scroll benefits then theres much more such as real deal ally mcbeal Garrett GTX3076RS turbos with a 3" inlet) and that's about it for OTS mods. However me and someone from FB (Nick Marinos if you're active on the FB pages) have plans to come up with some of the basic bitch mods that make legit decent power like a S2 lpfp, I might come up with inlets if this other company doesnt release their "M5 style aluminum intake" which is both an inlet and intake with provisions for the MAF sensor. And obviously theres a handful of tuners especially on bootmod3, plus options like the JB4 that can control the electronic wastegates alone.
Personally I think N63TU (especially w/ Xdrive):S63TU as the N54:S65. Lots of untapped potential on those cars considering the N63TU and S63TU in the F10 M5 share 90% of the same hardware and engine components. The F10 M5 has forged pistons, larger + twin scroll turbos, a very unique exhaust manifold and different valvetrain but that's it. I think with a LPFP upgrade, real inlets, higher BAR TMAP sensors and an e50 tune you would easily be in the 10s. Throw in upgraded turbos and possibly larger inlets/turbo snout plus some relatively minor weight reduction and you could have a DD track monster that may or may not make the HP of an all out N54 build but would certainly give it and any S55 or most S63s a serious run for their money at the strip.