The anodized aluminum housing features two selectable threaded male fittings. The 8AN ORB version (right) seals using a FKM O-ring while the 3/8" NPT variation (left) seals with the tapered pipe threads.
The FPDs can be mounted at any possible angle including upside down. For best results, the damper should be mounted directly onto the fuel rail(s).
This product is safe for use with all fuel types including alcohol blends such as E85.