I purchased a CPO 2011 BMW 550i xDrive around 3 months ago. Unfortunately my car had issues with the timing system and has turned out to be a lemon. BMW has agreed to buy back my car and I am planning to go with a Mercedes instead(due to bad customer service from local dealer). I was able to enjoy the mods on the car only for a month (as car was in the shop for almost 40 days before it was declared as a lemon). I have no use of them now and am looking to get rid of them as soon as possible.
I have a BMS Stage 1 tuning box with Type A Harness for the N63 motor. This was an easy mod, which took me 5 minutes to install myself. I highly recommend it to anyone looking for the best bang for their buck as the car pulled like a hot rod. It was purchased brand new for $450 and I am willing to let them go for around $350.
Also have the bolt on Eisenmann Race exhaust for the car. The car sounded amazing with these on. Luckily I held on to my factory exhaust system and was able to switch the exhaust back before letting the car go. There are a number of threads on the forums about this exhaust for more information. These were NOT welded, but simply bolted with clamps(included). The install did require cutting the original exhaust and then bolting on these mufflers. I believe the retail was around $2650 and I am willing to let them go for around $2150.
PM me if you have any questions or offers.
Cheers!