I bought my e39 m5 a month ago and am very pleased with it so far. What I need help with is to have someone drive it who has driven an e39 m5 before and tell me if they think it has all the power it should. I owned an e36 m3 and to me it doesn't feel any different up to 80mph. The car does have a lot of dinan upgrades including chip, CAI, maf sensors, free flow exhaust. I am kind of disappointed with the power and not sure if that's all the power it ever had or if I have a CPS failure, vacuum leak, or what. It did have a dr vanos kit installed in the last 30k miles. Also have the peake tool and no codes.