The modified body is 3mm bigger. This may not sound much, but it will allow up to 15% more airflow.
You should be using the M52 body, not the M50 body.
I am talking about the increase in butterfly size, not where it simply bolts up.
do you have a big bore for the m50 325i ? im going to use a 3.5 hfm from a 540i and want a bigger throttle body.
Yes I do have a bigger body for the M50 325i
Get a straight through exhaust system, good air filter and then get it re-maped.
Fairly cheap if you look about for second hand exhaust on ebay and im pretty sure theres a good tuning company that re-map most cars in tonbridge kent!!!
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