Grimmspeed Aluminum Turbo Inlet - Subaru 17-21 WRX - 125026One of the biggest complaints we've heard from 2015 21 WRX owners has to do with cracks forming in their OEM plastic turbo inlets from removal, installation or just general wear and tear. As the plastic inlet ages and becomes brittle, it has a tendency to separate around the BPV and or turbo flange portion of the piece. Since the inlet is one of the most critical components for metered air and consistent performance, cracks or separation can lead to