On this one we had our job of improving made extremely hard by BMW them selves we went through all the testing, jumps and hoops only to find how good BMW design actually is.

However when we were looking for ultimate performance we found original diameter to be a constrain, so we had to develop something that could deliver outstanding performance and address the diameter. We teamed up once again with a leading company on the field (ITG) and created something that looks stealth and delivers ultimate performance. ITG is a leading company on induction technology and have developed mostly for F1 and other serious motorsport applications, their know how along with our perseverance on seeking ultimate performance guarantees the ultimate performance is possible to achieve without hitting any restriction and being able to deliver up to 350bhp without causing a restriction, stock airbox started showing not ideal pressure drop values on our testing over 280 bhp.
This airbox will come complete with all parts needed for the fitting and will be available in Carbon or a printed reinforced plastic.

Please note this airbox will require ecu calibration upon install as it runs a bigger diameter maf housing, not doing so can seriously harm your engine.

As other option if you are looking to get the best of your stock airbox please check our drop in air filter for stock airbox and our intake elbow