AEM Universal Black Adjustable Fuel Pressure Regulator Returnless Fuel System 22mm wrist pin for use

22mm wrist pin for use with IE rods

The PCV system is a closed loop requiring a vacuum signal from the intake manifold to open the PCV valve

sportier tone than stock while keeping cabin resonance in check for daily use

The stock airbox on your Audi S4 or S5 has been manufactured to silence all engine and supercharger sounds at any performance cost

HKS-logo purple silicone hoses included

AEM Universal Black Adjustable Fuel Pressure Regulator Returnless Fuel System 22mm wrist pin for useAEM's Universal Adjustable Fuel Pressure Regulator (AEM 25 302BK) is capable of supporting enough fuel flow for engines up to 1000 horsepower. Our universal AEM FPR is tapped to accept a 6 AN, or 9 16"x18 fittings and includes a 1 8 NPT port for a fuel pressure gauge or pressure sensor pick up. Warranty Installation Instructions