5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
I might be wrong, but I think the M5 has the M-TEC suspension package which came as standard on the sport or as an optional extra on all other models. If this is the case it is a bit stiffer sprung and 15mm lower with uprated bushes and sway bars.
Performance wise - the 5er handles great anyway, so any stiffening or lowering should make it even a great handling car into a greater handling car.
For serious handling try dropping her 40mm all round with overcoil shocks, uprated sways and bushes, a front strut brace and a set of 19"'s - you will be able to corner like you're on rails, but the road ride quality will be bloody awful.
Why does everybody say lowering your car w/ big wheels makes the ride quality awful? If done properly, it looks great and rides great.. just stiff. I have yet to be in a lowered car that has given an uncomfortable ride.
Also, im not sure if the m5 suspension will fit, and if it does I doubt it will lower your car because the m5 is a good bit heavier, so the springs will not be compressed as much as they are designed to with the weight of the 528 on them. Even though the m5 shares the same chassis, a lot of parts are not interchangeable between e39s.
Just look for a good suspension set up designed for your car, it will be best.
Stiff suspension & low profiles obviously equals feeling every hump and bump in the road - in EVERY car I've been in with stiffened springs and low prof's it's a simple law of physics - hard = no give = harsh ride.
This must just be a preference thing.
I honestly dont think the cars are that much worse at all. Of course they aren't as smooth as stock, but I can only really tell a huge difference when there are *sharp* bumps or dips, etc. It's not as bad as people make it out to be.
I have done a couple swaps and it does make the 528's 540's handle amazingly however m5 suspension will not lower the car it will more likely raise it just slightly. So if that doesnt bother you then i highly recommend it.
In all fairness sporky, from what I hear the roads in the states are much better than here in the UK where almost every road is full of potholes and poor maintenance repairs. So you probably won't feel a hard ride as much.
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