AEM FPR Adjustable Fuel Pressure Regulator For Acura Honda B18 D15 D16 25-300BK. 1986 For Honda Accord LXi – 2.0L/1955ccL4 [BT]. 1989 For Honda Accord SEi – 2.0L/1955ccL4 [A20A3]. 1990 For Honda Prelude Si – 2.1L/2056ccL4 [B21A1]. 1991 For Honda Prelude Si – 2.1L/2056ccL4 [B21A1]. 1990 For Honda Prelude Si 4WS – 2.1L/2056ccL4 [B21A1]. 1991 For Honda Prelude Si 4WS – 2.1L/2056ccL4 [B21A1]. 1990 For Honda Prelude Si ALB – 2.1L/2056ccL4 [B21A1]. 1991 For Honda Prelude Si ALB – 2.1L/2056ccL4 [B21A1]. AEM’s For Honda/Acura Adjustable Fuel Pressure Regulators are capable of supporting enough fuel flow for engines up to 1000 horsepower. Our patented interchangeable discharge ports enable the regulator’s output to match the output of any fuel pump. A single large discharge orifice is included. AEM includes a custom barb fitting to accommodate the factory fuel hose and the base of each regulator is tapped to accept a -6 AN or 9/16×18 fittings. CNC-machined from 6061-T6 billet aluminum. Mounts directly to O. Fuel rail or AEM High Volume Fuel Rail. Patented interchangeable discharge orifices match output of virtually any fuel pump (single large port included). Accept a -6 AN or 9/16×18 fittings. Adjustable from 20 psi to maximum fuel pump capacity. Boost dependent rising fuel pressure rate (1:1). No additional parts required for installation. Patent # 6,298,828. CP Cometic ACL Ferrea and ARP Kits. Custom Made Package Deals. Head and Main Studs. Your address must be confirmed. Buyers who pay with unconfirmed addresses will not be accepted. We always look to satisfy our customers in whatever needs they may have.