COLLECTORS AUTO SUPPLY Inc – since 1992. Window Sweeps & Felt Kits. Insulation & Sound Deadedners. Floor Mats & Carpet. Supplies and Uncut Material. Holley Performance 12-846 HP EFI Billet Fuel Pressure Regulator. Fuel Injection Fuel Pressure Regulator. HP EFI Billet Fuel Pressure Regulator. HP EFI Billet Fuel Pressure Regulator; 15-65 psi; 8AN O-Ring Inlet/Outlet; 6 AN O-Ring Return; EFI Bypass Style; Gasoline/Diesel/E85; Black Anodized. Fuel System Type: EFI. Fuel Type: Gasoline / Diesel / E85. Inlet Size: 8AN O-Ring. Outlet Size: 8AN O-Ring. Return Size: 6AN O-Ring. WARNING CA Proposition 65: Yes. Adjustable From 15-65 PSI For Precise Fuel Pressure Adjustment. Constructed Of Billet Aluminum For Good Looks. Used In Systems With A Return Line Back To Tank. Includes Fitting For Manifold Reference. Use With Electric Pumps Only. Holley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061-T6 billet aluminum for strength and durability. They feature a black bright dip anodized body and a clear bright dip anodized top for corrosion resistance and good looks. The Holley 12-846 fuel pressure regulator features(1) -8 AN O-ring inlet, (1) -8 AN O-ring outlet, (1) -6 AN O-ring return. Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR Sprint Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI is dominating the performance world as well as our products for GM’s LS engine. Holley’s products also include performance fuel pumps, intake manifolds & engine dress-up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies – Hooker Headers, Flowtech Exhaust, NOS Nitrous, Weiand, Earl’s Performance Plumbing, or Diablosport – Holley products can give you the edge you need over the competition. We’re car nuts and love helping people with restoring their classics. We’ve been doing this for over 30 years and going strong. Finding the perfect part for your classic car can be difficult, and even frustrating. And let’s be honest. What makes it worse is a general lack of customer love in the industry. That’s why we’re here, and that’s why we’re different. We’re car people just like you, and we know what you need. And if we don’t already know it, we’re listening. So, get in touch with us if you need help finding a part or have a question.