YESHMA EFI Adjustable Fuel Pressure Regulator Kit with Gauge — Black Aluminium, 0–100 PSI, 6AN Lines

YESHMA's EFI adjustable fuel pressure regulator kit is a complete, tunable system that maintains steady fuel pressure for EFI engines, featuring a built-in gauge, 6AN fittings, and anodized aluminum construction.

This all-in-one kit is built for street and track use where consistent fuel delivery matters. It supplies a user-adjustable range and a visual gauge readout, includes multiple 6AN adapter fittings and braided fuel lines, and uses durable materials—aluminum for the regulator body and stainless braid plus CPE rubber for the hoses—so it holds up under routine engine demands. Professional install is recommended for correct tuning and safety.

How do I set and read the fuel pressure accurately?

Adjusting the regulator is straightforward: watch the gauge while you change the regulator’s adjustment screw to reach the desired PSI. The included gauge shows the current pressure so you can tune between the regulator’s practical range.

• Read the gauge while engine is running or under specified test conditions.
• Turn the regulator screw slowly—small increments prevent overshoot.
• Confirm pressure stability at idle, part-throttle, and increased load.
• Use the 6AN fittings and included adapters to match your fuel rail connections.

What parts are included and how do they connect?

The kit is supplied as a complete assembly: the regulator, an installed pressure gauge, a bracket for mounting, multiple 6AN straight and 90° adapters, a fuel rail adapter, a port plug, and three braided 6AN fuel lines. The variety of adapters lets you adapt the regulator to most EFI systems with minimal additional hardware.

• One adjustable regulator with pre-mounted gauge for instant pressure feedback.
• Three 6AN straight and three 6AN 90° adapters for routing flexibility.
• One fuel rail adapter and a 6AN port plug for compatibility with common rails.
• Three braided stainless steel 6AN lines for durable connections.

What is the performance range and material quality?

The regulator provides a broad usable adjustment window commonly required for gasoline EFI systems, allowing fine control of fuel supply. The main body is machined from aluminum and finished in black for corrosion resistance, while the hoses combine stainless braid with CPE rubber to resist abrasion and fuel exposure.

• Adjustable pressure window suitable for most EFI applications.
• Aluminum regulator body for strength and light weight.
• 304 stainless braid and CPE-lined hoses for durability and chemical resistance.
• 6AN fittings for high-flow, leak-resistant connections.

Is this kit easy to install and what precautions should I take?

While the kit includes all necessary fittings, installation requires mechanical skill and knowledge of fuel systems. Correct routing and secure connections are essential to prevent leaks; always perform a pressure and leak test after installation and consider professional help if you’re unfamiliar with EFI plumbing.

• Follow safe fuel-system procedures: work in a ventilated area and eliminate ignition sources.
• Hand-start fittings, then torque to specification or follow adapter guidelines to avoid over-tightening.
• Bleed trapped air, verify gauge readings, and recheck fittings after a short test run.
• Instruction sheet is not included; professional installation is strongly recommended if unsure.

Who is this for? This YESHMA EFI fuel pressure regulator kit is aimed at car enthusiasts, tuners, and mechanics who need a reliable, adjustable regulator for gasoline electronic fuel injection systems. It suits people upgrading fuel delivery for higher performance, replacing faulty regulators, or adding a visible gauge for easier tuning—but it’s best installed and tuned by someone comfortable working on fuel systems.