The Fuelab 51502-1 is an inline fuel-pressure regulator. It is adjustable from about 25 to 90 psi. Fine-thread adjustment makes small changes. A 1:1 boost port raises fuel pressure with manifold pressure.

Two -6 AN inlets and one -6 AN outlet, all female O-ring. A 1/8-inch NPT gauge port and a plug are on the body. The bracket and stainless hardware are in the box. It is billet aluminum and works with diesel, gasoline, methanol, and ethanol.

It fits a diesel or gas system that needs an inline regulator in the 25 to 90 psi range.

Fitment

• Inline regulator
• About 25 to 90 psi
• Two -6 AN inlets
• One -6 AN outlet
• 1:1 boost port
• 1/8-inch NPT gauge port
• Bracket and hardware included

Set it with a gauge on the port. Lock it after the set. Check for leaks before the first start.