Don't forget I have a dedicated track car (2315 lbs, 385 NA hp), hard core e46 M3 street car (3150 lbs, ~400 hp with full interior), and (for now at least) a highly performance modded (470 hp) e39 M5 already. My goal for this car is a comfortable/quiet DD/family car that has sufficient driving dynamics to not annoy me (so I can actually DD it instead of always leaving it home).
Side note, I put in all new bushings with the factory shifter, too.
Food for thought: when BMW put the shift lever setup in the M5 that they did, do you think they were unable to make it shorter? I don't, as there's nothing hard about it-- the stock throws are what BMW thought was best. The longer I've been driving, the more I agree-- I like adding precision/decreasing slop, but no longer shortening throws.
Even the space save spares take up a fairly large amount of trunk space. I am going to stick with the quad exhaust (for cost reasons), but... that doesn't make me not think it's stupid. It's style over substance, form over function... and makes the car dramatically less practical with no benefit other than cool looks. And the practical sacrifice annoys me enough that I can't really appreciate the look-- all I see when I look at it is a concession to vanity.
You make some valid points. However, if BMW wanted to make a the M5 with twin mufflers and a spare they definitely could of achieved that. Look at the w211 E55, Twin mufflers, rear battery and a spare. The design team, based most of their work on the E39 540i (which BTW is a great car with a FULL SIZE SPARE), and instead of engineering a solution to maintain both twin exhaust and spare, decided to go with power over a spare.
Yes i said it, power over a spare.
You mentioned that the twin exhaust was "form over function." I respectfully disagree. The S62(as you know) has 2 banks. it is not in-line like the s54. In theory, the less restriction of airflow to the mufflers, the more power the car will make. Adding back to back 45degree pipe bends, to join exhaust banks, making it a 1-exhaust setup, is something they were trying to deviate from with the 540i and that would of been pedaling backwards.. Does the twin exhaust setup yield BIG power. I doubt it. But i'm sure they needed all the power the could get naturally, as i'm sure the higher ups at BMW had certain power parameters that had to be met. Could they have taken the time to make a spare work. YES.
Form over function. No.
Style over substance. No.
If I met a member of the design team I would ask. Why didn't they take the time to fit both exhaust and spare? It bothered me then in my E39 M5 (especially after getting a flat in the freezing cold) and it bothers me now in the M6, but i am looking into a lightweight inflatable spare and compressor setup that would not alter the space in my trunk.