Sale

Air and Fuel Fuel Pumps, Regulators and Components

(1987-2004)

Mustang Return Style Fuel System

$1,168.00 $1,089.00 Save $79.00

SKU: 8704FS.MD.2

In Stock
In Stock
Ships by Jul 29
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30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The On3 Performance (1987-2004) Mustang Return Style Fuel System is a complete package designed to simplify fuel system installation. It features dual 320lph fuel pumps capable of supporting up to 1000hp and is E85 compatible.

The system utilizes a billet 6061 aluminum fuel hat with a two-piece design that consolidates fuel pumps to a single port, eliminating the need for welding and extra fittings. It includes O-ring fittings for easy installation and a reliable seal, anodized black for E85 compatibility and corrosion resistance. The kit comes with a 10AN supply line, an in-line fuel filter, a Y-block for fuel rails, and a 1:1 boost-referenced fuel pressure regulator. An 8AN return line kit is also included but can be deleted for return-less systems.

Fitment

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Specifications

Brand(1987-2004)
Part Number8704FS.MD.2
CategoryAir and Fuel

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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