Add to Favorite Sellers. Holley EFI 12-886KIT Holley Die Cast EFI Bypass Fuel Pressure Regulator Kit. 15-60 Psi – Fittings and Gauge Included; Holley Die Cast EFI Bypass Style Fuel Pressure Regulator Kits are part of a complete line of fuel system products from Holley. The included 12-886 regulator features a die cast aluminum body […]