Overview Reviews Product Description This fitting replaces the schrader valve on ford engines allowing the user to attach a 4AN AN mine to the fuel rail. Product Videos Custom Field Product Reviews Write a Review Write a Review × Nitrous Express 4AN Male x 1/16 NPT Male (Ford Fuel Rail Fitting) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *