The factory BMW charge pipes are prone to cracking, as they are made from brittle plastic. Here at Turner, we sell several brands of replacement charge pipes that are typically made from cast aluminum. We recommend upgrading to hard charge pipes even on stock forced induction vehicles to avoid cracking - we've seen cracking occur on high mileage cars running stock power just as frequently as we do with high horsepower builds.
Carbon Turbo Inlet set from Eventuri, which optimizes the flow path all the way to the turbos. These carbon inlets have a larger volume than the stock inlets by maintaining a larger diameter all the way to the turbos. The stock inlets narrow down immediately after the connection to the intake which creates a restriction, especially at higher boost levels. The folks at Eventuri have alleviated this restriction and also designed the curvature to be as smooth as possible allowing the turbos to reach peak boost sooner.
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