Description: Revolutionary design provides two independent pressure adjustments; one adjustment for idle and one for wide open throttle. Engineered for use with variable volume pumps tied to engine RPM. This regulator creates the smoothest and most repeatable fuel curve from idle to wide open throttle of any return style system. ORB-10 return port. P/N 13209 provides (1) ORB-08 inlet and (3) ORB-08 outlet ports. Can be configured for single or dual carbureted engines and provides superior pressure control and flow when installed before the carburetor or after a fuel log. This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications. Also available with a single inlet port for fuel logs. (P/N 13214) - provides ORB-10 inlet and return ports.