Control your fuel pressure with one of these Aeromotive Extreme Flow EFI fuel pressure regulators. They're manufactured from durable aluminum, then anodized for maximum protection. The regulators include a standard spring (installed) that supports 30-75 psi base fuel pressure and a high pressure spring (included) to support 75-120 psi base fuel pressure. Aeromotive Extreme Flow EFI fuel pressure units also support vacuum and boost reference on a 1:1 ratio.