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. 1/8' NPT gauge port. Provides superior pressure control and flow when installed before the carburetor or after a fuel log. P/N 13214 available with fuel log P/N 14201 or 14202, fittings and gauge as P/N 17249 or 17251.