Just purchased a e39 523i tourer and love the car on the motorway picks up really well but low down it is piss poor so sluggish although i have posted on another thread i may have an air leak so may be causing this
just want to know what mod's to do to these engines, its 99 model
service, filter or dave f filter, BBTB aplina 527 i think it is? and a remap? is that about it without spending 1000's?
if all done what rough bhp would i be looking at just under 200bhp?