BMW E46 M3 S54 AirBox Modification – E30 Swap

The S54 airbox will not fit in the E30 engine bay with the stock brake booster. Kassel Performance recommends using a Porsche 944 brake booster for a stock-like pedal feel coupled with ease of installation. The S54 air plenum will still need to be modified in order to clear the brake booster. Currently, we do not stock any cores but will be doing so in the near future. Please send your intake manifold to us upon checking out and allow 7-10 business days for modification.