P/N 13203: A4 Carbureted Regulator 

The only four-port regulator on the market that uses a ‘soft-seat’ design, eliminating pressure creep at idle and, if used, on a throttle stop. Used by many of the best ‘Super’ class racers in the world. This exclusive design ensures the precise pressure control needed for more consistent E.T.s. This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications.

• Adjustable from 5-15 PSI.
• Gasoline and alcohol compatible.
• Standard static flow design, no return line required.
• (4) ORB-06 outlet ports and 1/8′ NPT gauge port.
• (2) ORB-10 inlet ports for plumbing flexibility.View Installation Instructions