Aeromotive Honda/Acura Billet Adjustable Regulator 13115 - Billet adjustable regulators specifically designed for Honda and Acura engines to provide fully adjustable base fuel pressure. These  regulators are direct bolt-on for engines with the factory fuel rail or aftermarket fuel rails designed with mounting provisions for the  stock regulator. Adjustable from 30-70 PSI. Connects directly to the stock fuel rail and return line. Perfect for use with the factory fuel pump, yet flows enough for  larger pumps like the Aeromotive A1000. The same unrivaled, Aeromotive fuel pressure control preferred by the top racers and tuners, in a Honda specific, bolt-on package. Fuel pressure rises on a 1:1 ratio when referencing boost. 1/8' NPT gauge port. P/N 13115 f(98-01 2.3L VTEC) 98 - 02 Accord 4 cyl, 96 - 97 Del Sol Si, 00 - 04 S2000 and 98 - 99 CL 2.3L. P/N 13116 (92-97 1.6L VTEC) for 86 - 89 Accord LXi/SEi, 92 - 95 Civic, 99 - 00 Civic Si, 93 - 95 Del Sol S/Si, 94 - 97 Del Sol VTEC, 89 - 91 Prelude Si and 94 - 01 Integra.