As I'm new to Beamers I really have no idea about them apart from the M 50manifold as told to me by my girlfriend's brother in law.
As my car is a 1997 328i SE auto, why is the M50, being a 2.5L unit, a good upgrade if it's from a smaller engine? Is it from one of the 'M' powered cars, hence the letter? ie:
Also, what gain can be had by whacking a sports panel filter in? K&N/PiperX etc If it's a good cheap mod, which make would be best please?
Sorry if these have been asked before. If so, could a mod please link me to the correct threads and close this one?