Fitment and Product Information. Fuel Pressure Regulator Inline Fuel Pressure Regulator 4-12 psi. Brandname: Magnafuel Part Number: MP-9633-Blk Product Details. They feature a durable metal-to-metal seat for instantaneous response and low maintenance. Two and four-port configurations are available. The boost-reference models provide a 1:1 compensation ratio. They’re suitable for drag racing, Circle Track, road racing, mud bog, power boat, and tractor pulling. These regulators offer adjustable base pressure and precise pressure control. MagnaFuel carbureted fuel pressure regulators are machined from billet aircraft aluminum and are anodized for a long-lasting finish. Part Type:Fuel Pressure Regulators. Product Line:MagnaFuel Carbureted Fuel Pressure Regulators. Pressure Range (psi):44534. Boost/Vacuum Reference Port:No. Regulator Inlet Size:-10 AN. Inlet Attachment:Female straight cut O-ring. Regulator Outlet Size:-6 AN. Outlet Attachment:Female straight cut O-ring. Regulator Finish:Black anodized. Mounting Bracket Included:Yes. WARNING : This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer.