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Quantum 255LPH Fuel Pump Ford Mustang GT 5.0/4.6 1986 - 1997


HFP replacement fuel pumps, modules, assemblies, and kit components are designed to meet or exceed OEM specifications, and feature upgrades that improve on the OEM design. Upgraded polymers, brushes, and commutators ensure long life and durability in multiple fuel blends.  Each HFP fuel pump and installation kit is backed by a lifetime free replacement warranty.  If there is any issue of any kind at any time, give us a call or email us and we will replace the pump free of charge.


Features & Benefits:

  • OEM or better performance

  • Polished corrosion-resistant case to help minimize seizing during non-operation

  • Specifically designed for quiet operation

  • Drop-in replacement

  • Gradient density fuel strainer for superior contaminant filtration

  • Patented check valve technology

  • Compatible with modern ethanol-infused pump gasoline

Availability: IN STOCK
Pricing: $29.98
USPS Priority Mail / First Class Small Items


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Suggested Add-On


Quantum Inline High-Flow Viton Fuel Pump Check Valve 8mm / 5/16"



A common side effect of high volume (and OEM) intank fuel pumps are their inability to maintain static fuel pressure when the vehicle sits for any extended period of time.  This leads to a "hard starting" condition where the starter must engage continuously for 3-4 seconds (or longer) before the motor will finally start.  This side effect is commonplace with all high performance, high volume fuel pumps including Walbro, AEM, Aeromotive, and Quantum fuel pumps.  Our check valve resolves this issue once and for all, and can be used either intank, or externally.  It features a high-flow design which uses viton seals and stainless steel internals which are compatible with modern pump gasoline as well as E85.  This check valve will not significantly alter the flow capabilities of your pump, but it will make sure that the car starts instantly, every single time.  We recommend installing an inline check valve even with a brand new pump, so the tank doesn't need to be dropped again a few months later.





Extended Description

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Noise Level: Nearly Silent

Condition: 100% BRAND NEW
Design: Intank
Flow: 255LPH
Minimum Voltage: 12V
Operating Pressure: 15-100 PSI - final fuel pressure set by regulator

Warranty: LIFETIME


4 3/4" Long from inlet tip to outlet tip
3 1/8" Long for the metal case
1 5/8" Wide for the metal case
Inlet width: 5/16" (341/ 342), 7/8" (340), 3/4" (343)
Outlet width: 5/16"


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Walbro GSS340: