I put the intake mani from a M50 on my M52B25, replaced the spark plugs and put a K&N air filter mat in, also fittet a Reuter Motorsport muffler







Dynoed it with 200 bhp.




need to get the ECU done someday, I'm also thinking about getting some Schrick cams. Should be good for 220hp.

it depends what amount of hp you'll get, because the 323 use to spread upwards

Goes pretty well, I outrunned a Audi A3 2.0 Turbo yesterday on the Autobahn.....have to admit I have the winter tires on (smaller, slimmer).

325 and 323 both are totaly different engines, also the 325 produces more torque.