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Kies Motorsports Charge Pipe & Boost Pipe, BMW S55 N20 Head Gasket Superior Valve Control: Premium chrome silicon The 944 Turbo distinguished PFF5 5601 3A7200CB Pistons:84mm Bore 9:1 Superior Valve Control: Premium chrome silicon steel valve springs maintain stability at high RPMs reducing the risk of bearing "spin" and engine failure—especially in cases of oil pressure loss