PLM Power Driven Equal Length Header - Subaru WRX 2015-2021PLM Private Label Mfg. Power Driven Subaru Impreza WRX HEADER 2015+ EQUAL LENGTH HEADER ( Turbo Manifold ) features an equal length header design. The header delivers low to mid end power while utilizing a one piece design which maximizes the engine compartment space. The header will bolt up to the stock location as a direct replacement. Starting from the front of the vehicle the header is designed as a much better free flowing turbo manifold.