Aeromotive Double-Adjustable Bypass Regulator 13209 - 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 bypass 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. Also available with a single inlet port for fuel logs. (P/N 13214) provides ORB-10 inlet and return ports.