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Universal In-Tank Stealth System, part number FM9807
CLASSIC PARTS GARAGE · SCHEMATIC
FM9807
FM9807AeromotiveFront

Universal In-Tank Stealth System

Universal in-tank stealth fuel system designed for custom EFI, restomod, performance, and engine-swap applications. Mounting the pump inside the tank helps create cleaner plumbing, quieter operation, and improved pump cooling compared with many externally mounted fuel-pump setups.

In stock12 Months

Not concours correct

This system is correct for custom fuel-delivery projects because it uses an in-tank pump layout, allowing the pump to remain submerged in fuel while reducing external plumbing and pump exposure.

$827.00$927.50Save $100.50
1
003Specification

What it is

SHEET
003
SUBJECT
FM9807
SCALE
1:1
REV
A

Universal In-Tank Stealth Fuel System Product Description Shop universal in-tank stealth system for custom EFI, restomod, street-performance, and high-flow fuel applications. Replacing a used external fuel pump setup with an in-tank system can create cleaner plumbing, quieter operation, and more consistent fuel delivery. Order universal in-tank stealth fuel system when building a custom fuel tank or upgrading an older performance fuel setup. Designed for adaptable installations, this system places the fuel pump inside the tank for a discreet, compact configuration. It is a strong choice for classic cars, muscle cars, trucks, engine swaps, and custom builds that require dependable fuel delivery without an externally mounted pump. Key Features Universal in-tank fuel delivery design Suitable for EFI and selected performance applications Hidden “stealth” installation inside the fuel tank Helps reduce external pump noise Cleaner fuel-system plumbing Suitable for custom, restoration, restomod, and race-inspired builds Can support high-flow fuel requirements depending on pump configuration Helps keep the pump submerged and cooled by fuel Compatible with custom tank modifications where properly installed Useful for engine swaps and modern EFI conversions Product Specifications Specification Details Product Type Universal In-Tank Fuel System Application Universal / Custom Installation Location Inside Fuel Tank Fuel Injection EFI / Verify Application Fuel Pump Verify Kit Contents Fuel Pressure Capability Verify Flow Rate Verify Fuel Compatibility Verify Feed Line Size Verify Return Line Verify Configuration Electrical Requirements Verify Mounting Hardware Verify Application Custom / Restomod / Performance Fuel System Why Choose an In-Tank Stealth System? An in-tank pump can provide quieter operation, cleaner packaging, improved pump cooling, and reduced exposure to road debris compared with many external-pump installations. It also creates a more discreet fuel-system layout for restorations and custom builds.

Features
  • Universal in-tank fuel-system configuration
  • Suitable for EFI and selected high-performance applications
  • Stealth installation keeps the pump inside the fuel tank
  • Helps reduce external fuel-pump noise
  • Cleaner and more compact fuel-system packaging
  • Fuel helps cool and lubricate the in-tank pump
  • Suitable for classic cars, muscle cars, trucks, and custom builds
  • Useful for EFI conversions and engine swaps
  • Can support higher-flow requirements depending on pump specification
  • Helps protect the pump from road debris and weather exposure
  • Suitable for custom tanks and modified factory tanks where properly fitted
In the box
  • In-tank electric fuel pump
  • Fuel pump hanger / mounting assembly
  • Tank mounting plate or flange
  • Pickup / inlet components
  • Fuel filter or pre-filter where supplied
  • Feed fittings
  • Return fittings where applicable
  • Electrical bulkhead / wiring connections
  • Seals and gaskets
  • Mounting hardware
  • Installation instructions where included

Shipping weight 18.00 lb

004Application register

Everything this fits

4 applications · 0 verified

SHEET
004
SUBJECT
FITMENT
SCALE
1:1
REV
A
Ford4
  • 1979–1993Mustang
    All engines
  • 1969–1973Mustang
    All engines
  • 1967–1968Mustang
    All engines
  • 1964–1966Mustang
    All engines

This is a universal system, so custom installation may be required. Verify fuel tank depth before ordering. Confirm there is enough internal clearance for the pump and hanger assembly. Check mounting-surface diameter and available flat area on the tank. Verify pickup position and fuel level requirements. Confirm feed and return line sizes. Check fuel pressure and flow requirements for the engine. Verify compatibility with the intended fuel type. Ethanol or alcohol-based fuels require compatible pump, seals, hoses, and fittings. Confirm regulator type and return-system configuration. High-flow pumps may require upgraded wiring, relay, fuse, and charging-system capacity. Tank cutting or drilling may be required. All tank modifications should be performed with the tank completely drained, cleaned, and free of fuel vapors. Proper venting and rollover protection should be retained or added where required. Professional installation is recommended when modifying the fuel tank.

005Counter questions

Asked about this part

What is this product?
It is a universal in-tank fuel delivery system designed for custom EFI, restomod, street-performance, and selected racing applications.
What does “in-tank” mean?
The fuel pump is installed inside the fuel tank rather than mounted externally.
What does “stealth” mean in this application?
It refers to a discreet in-tank installation that hides the pump and much of the fuel-system hardware from view.
Will it fit every fuel tank?
No. Tank depth, mounting surface, internal clearance, and fuel-system layout must be checked.
Can it be used with a factory fuel tank?
Possibly, if the tank can safely accept the required mounting flange and internal components.
Can it be used with an aftermarket tank?
Yes, if dimensions and mounting provisions are compatible.
Can it be used in trucks?
Yes, if the tank and fuel requirements are compatible.
Can it support high-performance engines?
Yes, if the pump and system are sized correctly for the engine’s fuel demand.
Why does horsepower matter?
Higher horsepower generally requires more fuel flow.
Can an oversized pump be used?
It can, but regulator capacity, return-line size, wiring, and fuel heating should all be considered.
Does this system reduce pump noise?
It often can because the pump is submerged inside the tank.
Does fuel help lubricate the pump?
Yes, for pumps designed to operate submerged in fuel.
Is this suitable for a show car?
Yes, especially where a clean engine bay and chassis appearance are desired.
Does the kit include a fuel pump?
It may. Verify the exact package contents.
Does it include AN fittings?
It may include some, but verify the exact kit contents.
Can this be used with a return-style fuel system?
Yes, if the system and regulator are configured for it.
Can it be used with a returnless system?
Possibly, depending on the pump module and control strategy.
Why does tank depth matter?
The pump hanger and pickup must fit inside the tank without contacting the bottom or top incorrectly.
Does the mounting surface need to be flat?
Yes, or sufficiently flat for the flange and seal to seat properly.
Should the flange area be reinforced?
Sometimes, depending on tank material and thickness.
Is draining alone enough before cutting or drilling?
No. The tank must also be thoroughly cleaned and free of fuel vapors.
Does the pickup need to sit at the very bottom?
It should be positioned according to the system design, close enough to maintain reliable fuel pickup without improper contact.
What is cavitation?
It is a condition where the pump cannot receive fuel properly, reducing performance and potentially damaging the pump.
Should the gasket be reused?
A new gasket is preferable when the system is opened, unless the manufacturer states otherwise.
What does it do instead?
It helps provide the fuel delivery needed to support the engine’s existing or planned power level.
Can it fix a weak or noisy external-pump setup?
Yes, if the external pump is the issue and the new system is properly sized.
What should I verify before ordering?
Confirm the fuel tank depth, mounting surface size, internal clearance, fuel-level sender position, baffle location, pickup placement, feed and return line sizes, required fuel flow and pressure, fuel type, regulator configuration, pump current draw, wiring capacity, venting strategy, horsepower target, and exact kit contents before purchase.
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