Not driving fast anymore since i busted my auto gearbox.
I suspect it's down to the increase in bhp, but it may just be because i have clocked over 150000km with it.
The conversion, together with a Big Bore Throttle Body, a Cold Air Intake & a remap or chip is said to give you around 20 - 30bhp depending on how good your car was to start with and what kind of parts you put it. I take it as 20 bhp, 30 has been acheived by only one guy so far.
A stock 328 is aleady a pretty good car, messing with it only causes more problems. But that didn't stop me from trying.
read e36coupe.com for more details on the Manifold & BBTB.
Good luck.