Adjustable Carburetor Fuel Pressure Regulator Kit 1-4 PSI 12-804

JOCESTYLE Adjustable Fuel Pressure Regulator Kit with Gauge – Carburetor 1–4 PSI (12-804 Replacement)

Upgrade your vehicle's fuel system with the JOCESTYLE Adjustable Fuel Pressure Regulator Kit. Engineered specifically for Holley carburetor applications using the 12-804 reference part number, this kit delivers precise fuel pressure control from 1 to 4 PSI — keeping your engine running smoothly and efficiently.

Made in Mainland China.

Key Features

• Application-Specific Fitment: Designed for compatibility with Holley carburetor 12-804 and 3/8" NPT ports (1-inch and 2-inch). Ensures a snug, reliable fit for your specific fuel system setup.
• OE Reference Part Number: Uses 12-804 as the OE reference, guaranteeing accurate fitment. Please verify your OE number before ordering to ensure seamless installation.
• Purpose-Built Fuel Control: This low-pressure regulator controls fuel flow from the pump to the carburetor, allowing you to fine-tune fuel delivery based on your vehicle's needs and carburetor configuration.
• Protects Your Engine: Precisely manages fuel pressure to help prevent needle valve overload and overflow issues, safeguarding engine reliability and driving performance.
• Premium Zinc Alloy Construction: Built from high-strength zinc alloy that resists rust and corrosion, offering exceptional durability and an extended service life.
• Includes Gauge: Kit comes complete with a fuel pressure gauge so you can monitor system pressure at a glance — no separate purchase needed.

Specifications

What's in the Box

• 1 × Fuel Pressure Regulator
• 1 × Fuel Pressure Gauge

Please Note: Due to variations in monitor settings and lighting conditions, the actual color may differ slightly from product images. Please allow 1–2 cm tolerance due to manual measurement. This regulator is not suitable for use above 5 PSI.

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Learn more: FuelEconomy.gov on vehicle maintenance

Frequently Asked Questions

Q: What vehicles or carburetors is this fuel pressure regulator compatible with?

A: This adjustable fuel pressure regulator kit is specifically designed for use with Holley carburetor 12-804 and systems with 3/8" NPT ports (1-inch and 2-inch configurations). Always verify your OE reference number (12-804) before ordering to confirm compatibility with your specific setup.

Q: What is the adjustable pressure range for this carburetor fuel pressure regulator?

A: The regulator is adjustable between 1 and 4 PSI, with a 0.220 in (7/32 in) limit. It is not recommended for use above 5 PSI, so please ensure your application falls within this range for safe and optimal operation.

Q: Does the kit include a fuel pressure gauge?

A: Yes! The kit includes both a fuel pressure regulator and a fuel pressure gauge, so you have everything you need to monitor and adjust your carburetor fuel pressure right out of the box — no additional purchases required.

Q: What material is the fuel pressure regulator made from?

A: The regulator is constructed from high-strength zinc alloy, which provides excellent rust resistance, corrosion resistance, and long-term durability — making it a reliable replacement for your carburetor fuel system.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.