Got the exhaust fitted!
But before getting to that part, I must jump back to the transmission oil. When I did the clutch job I used Liqui Moly 75W-80 GL 3+ which is not a bad oil, but it was simply unbearable when the car was cold. First 3 gears and especially the 2nd was really difficult to shift. After the car is warmed up, all of the gears were buttery smooth so I decided to try something different.
After doing some research, I found that Royal Purple Synchromax is amongst popular on the board, but that stuff isn't very easy to find here.
I got in touch with Motul directly and at their recommendation, I bought 2L of Motul DCTF. Mainly used in dual-clutch gearboxes but it's also applicable in conventional gearboxes. Most importantly it fulfills proper specification - SEA 75W and BMW MTF LT-1 & 2 specifications.
The data sheet can be found here - https://s3-eu-west-1.amazonaws.com/m...pdf?1508420965
While the car was up in the air for the exhaust install, I used that opportunity and changed the tranny oil.
This morning I had a nice cold start and it's already much better! I can shift in the first 3 gears without much effort while before I had to work to slot into the 2nd gear. Of course, it's still not fully warmed up smooth, but it's a vast improvement from before. This oil is definitely a better choice for cold shifting.
Now back to the exhaust. I had a nearby shop to help me with this as I was lacking proper tools and didn't want to try this on my garage floor.
While the finish quality is great, the fitment could be better.
It was a pain to get everything aligned properly. Once we mounted the Eisenmann mufflers, the right one was sitting too close to the diffuser and left one was actually touching it. So after much adjustments we got it to clear the diffuser, but I think for how expensive the exhaust is the fitment should've been better. Eisenmann does tell you that the diffuser needs to be trimmed down but I wasn't willing to do that. After learning a couple of new swears in German, it all worked out well.
I'm still gathering impressions, but the M5 is now definitely making all of the right noises!
On idle and lower rpms it's very much the same to stock but when you push it, it's where the Eisenmann earns its money and reputation. It's just a glorious exhaust note.
Though I must admit I wish it was a little louder and I'm hoping that will change once the exhaust is fully broken in as I drive it more.
I will try to get a nice video soon. It'll take some getting used to those big guns in the back now.