In-Tank Fuel Pump, 83-97 EFI Fox Body Mustang

In-Tank Fuel Pump, 83-97 EFI Fox Body Mustang

Part Number: 18638
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Product Info

Fox Body Mustang 83-97 Stealth 340, 450 or 525lph Fuel Pump & Hanger
Assembly Fits all 83-97 Mustang OEM - EFI Fuel Tanks

Billet Fuel Pump Hanger and High Flow 340, 450, or 525lph Stealth Pump assembly drops into stock tank.  Supports high-flow, high horsepower combinations in stock 83-97 Mustang EFI fuel tanks.  Eliminates fuel starvation and return aeration common to the factory Mustang hanger.

  • CNC machined billet aluminum hat fits stock opening, with ORB-06 outlet and return ports.


  • Supports AN-06 or AN-08 fuel lines with P/N 15606 or P/N 15649 port fittings respectively.


  • 6065 aluminum hat is bright dip anodized black and laser engraved for good looks and durability.


  • Stainless Steel pump mounting bracket.


  • OEM grade convoluted tubing on supply and return for durability and high flow.


  • Extended, high flow return with anti-siphon eliminates aeration and cavitation.


  • This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications.


340 LPH (Part #18638)


Fuel Injected Engines:

  • Gasoline: up to 850 HP – naturally aspirated.


  • Gasoline: up to 700 HP – forced air induction.


  • E85: up to 595 HP – naturally aspirated.


  • E85: up to 490 HP – forced air induction.



Carbureted Engines:

  • Gasoline: up to 1000 HP – naturally aspirated.


  • Gasoline: up to 850 HP – forced air induction.


  • E85: up to 700 HP – naturally aspirated.


  • E85: up to 595 HP – forced air induction.


450 LPH (Part #19139)

Fuel Injected Engines:

  • Gasoline: up to 1,100 HP – naturally aspirated.


  • Gasoline: up to 800 HP – forced air induction.


  • E85: up to 750 HP – naturally aspirated.


  • E85: up to 550 HP – forced air induction.



Carbureted Engines:

  • Gasoline: up to 1,300 HP – naturally aspirated.


  • Gasoline: up to 950 HP – forced air induction.


  • E85: up to 900 HP – naturally aspirated.


  • E85: up to 700 HP – forced air induction.

 

525 LPH (Part #19140)

Fuel Injected Engines:

  • Gasoline: up to 1,200 HP – naturally aspirated.


  • Gasoline: up to 900 HP – forced air induction.


  • E85: up to 810 HP – naturally aspirated.


  • E85: up to 600 HP – forced air induction.



Carbureted Engines:

  • Gasoline: up to 1,400 HP – naturally aspirated.


  • Gasoline: up to 1,100 HP – forced air induction.


  • E85: up to 950 HP – naturally aspirated.


  • E85: up to 740 HP – forced air induction.

Installation Instructions

Instruction Manual
18638 Installation Instructions

Download PDF

Product warranty

Limited Warranty for Aeromotive Products for the United States of America

Aeromotive, LLC warrant to the original end user purchaser in the United States that the Aeromotive and Waterman Racing Components branded products (“Product(s)”) shall be free from defects in material and workmanship for the warranty durations set forth in the chart below from the date of purchase or delivery, whichever is later.

 Products Warranty Duration
  • Aeromotive marine pumps
2 years
  • All other Aeromotive products
  • Waterman Racing Components products
1 year

 

Because Aeromotive, LLC (collectively, the “Company”) cannot control the quality of products sold by unauthorized sellers, this warranty applies only to Products that were purchased from the Company or the Company’s authorized sellers in the United States, unless otherwise prohibited by law. Company reserves the right to reject warranty claims for Products purchased from unauthorized sellers, including unauthorized Internet sites.

This warranty does not cover any defects due to normal wear and tear, damage due to misuse, alteration to the product, negligence, damage caused by aftermarket applied coatings, discoloration, or corrosion of finished surfaces. This warranty also does not cover damage resulting from collision, improper installation, off-road use, road hazards, the use of exhaust insulating wrap or like products, or rust occurring after installation.

Purchasers of a Product who wish to make a warranty claim based upon an alleged Product defect should email the Company at techs@aeromotiveinc.com the following information: (1) Product subject to the claim, (2) brief description of the alleged defect, (3) date and place of purchase/delivery, (4) proof of purchase (showing when and where the Product was purchased), and (5) pictures or videos of the Product. If you purchased on an online marketplace, please be sure the proof of purchase shows from whom you purchased (this information is available in your order history). In some instances, Company may instruct you to mail the Product to Company for inspection and/or repair; if such instruction is provided, Company will provide you with a prepaid shipping label. You can also contact the Company Monday – Friday, 8AM – 6:30PM CT at (913) 808-2376.

Company will replace or repair a defective Product that is covered by this warranty. This
warranty does not cover the cost of removal or installation. Company will pay for the return shipping of the Product to the purchaser.

There are no warranties which extend beyond those stated herein. ANY IMPLIED
WARRANTIES THAT MAY BE APPLICABLE TO PRODUCTS, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
LIMITED IN DURATION TO THE DURATION OF THIS WARRANTY. Some States do not
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

UNDER NO CIRCUMSTANCES SHALL THE COMPANY BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES BASED UPON BREACH OF THIS LIMITED
WARRANTY, BREACH OF CONTRACT OR STRICT LIABILITY. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights which vary from State to State.

If you have any questions about whether a seller is authorized, please contact us at (913) 808-2376.

This warranty supersedes any warranties stated in product manuals or other written materials.

Effective Date: March 16, 2026

Returns & replacements

Returns:

  • Accepted within 90 days of purchase.
  • Prior authorization required; items must be new and resaleable.
  • Call 913-808-2376 to initiate a return and get an RGA.
  • Ship unused products in original packaging with proof of purchase.
  • You pay return shipping; use a trackable method.
  • Refund excludes initial shipping fees and may include up to a 15% restocking fee.
  • Refunds processed within 5-10 days of return acceptance.

Limits of Responsibility:

  • See Product Warranty page for more info.

Reviews

In-Tank Fuel Pump, 83-97 EFI Fox Body Mustang

In-Tank Fuel Pump, 83-97 EFI Fox Body Mustang

Part Number: 18638
Choose your Pump Size:
Regular price $346.41
Sale price $346.41 Regular price

Does This part fit My vehicle?

Assembled custom for you in 3-4 weeks in Kansas

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Product Info

Fox Body Mustang 83-97 Stealth 340, 450 or 525lph Fuel Pump & Hanger
Assembly Fits all 83-97 Mustang OEM - EFI Fuel Tanks

Billet Fuel Pump Hanger and High Flow 340, 450, or 525lph Stealth Pump assembly drops into stock tank.  Supports high-flow, high horsepower combinations in stock 83-97 Mustang EFI fuel tanks.  Eliminates fuel starvation and return aeration common to the factory Mustang hanger.

  • CNC machined billet aluminum hat fits stock opening, with ORB-06 outlet and return ports.


  • Supports AN-06 or AN-08 fuel lines with P/N 15606 or P/N 15649 port fittings respectively.


  • 6065 aluminum hat is bright dip anodized black and laser engraved for good looks and durability.


  • Stainless Steel pump mounting bracket.


  • OEM grade convoluted tubing on supply and return for durability and high flow.


  • Extended, high flow return with anti-siphon eliminates aeration and cavitation.


  • This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications.


340 LPH (Part #18638)


Fuel Injected Engines:

  • Gasoline: up to 850 HP – naturally aspirated.


  • Gasoline: up to 700 HP – forced air induction.


  • E85: up to 595 HP – naturally aspirated.


  • E85: up to 490 HP – forced air induction.



Carbureted Engines:

  • Gasoline: up to 1000 HP – naturally aspirated.


  • Gasoline: up to 850 HP – forced air induction.


  • E85: up to 700 HP – naturally aspirated.


  • E85: up to 595 HP – forced air induction.


450 LPH (Part #19139)

Fuel Injected Engines:

  • Gasoline: up to 1,100 HP – naturally aspirated.


  • Gasoline: up to 800 HP – forced air induction.


  • E85: up to 750 HP – naturally aspirated.


  • E85: up to 550 HP – forced air induction.



Carbureted Engines:

  • Gasoline: up to 1,300 HP – naturally aspirated.


  • Gasoline: up to 950 HP – forced air induction.


  • E85: up to 900 HP – naturally aspirated.


  • E85: up to 700 HP – forced air induction.

 

525 LPH (Part #19140)

Fuel Injected Engines:

  • Gasoline: up to 1,200 HP – naturally aspirated.


  • Gasoline: up to 900 HP – forced air induction.


  • E85: up to 810 HP – naturally aspirated.


  • E85: up to 600 HP – forced air induction.



Carbureted Engines:

  • Gasoline: up to 1,400 HP – naturally aspirated.


  • Gasoline: up to 1,100 HP – forced air induction.


  • E85: up to 950 HP – naturally aspirated.


  • E85: up to 740 HP – forced air induction.

Installation Instructions

Instruction Manual
18638 Installation Instructions

Download PDF

Product warranty

Limited Warranty for Aeromotive Products for the United States of America

Aeromotive, LLC warrant to the original end user purchaser in the United States that the Aeromotive and Waterman Racing Components branded products (“Product(s)”) shall be free from defects in material and workmanship for the warranty durations set forth in the chart below from the date of purchase or delivery, whichever is later.

 Products Warranty Duration
  • Aeromotive marine pumps
2 years
  • All other Aeromotive products
  • Waterman Racing Components products
1 year

 

Because Aeromotive, LLC (collectively, the “Company”) cannot control the quality of products sold by unauthorized sellers, this warranty applies only to Products that were purchased from the Company or the Company’s authorized sellers in the United States, unless otherwise prohibited by law. Company reserves the right to reject warranty claims for Products purchased from unauthorized sellers, including unauthorized Internet sites.

This warranty does not cover any defects due to normal wear and tear, damage due to misuse, alteration to the product, negligence, damage caused by aftermarket applied coatings, discoloration, or corrosion of finished surfaces. This warranty also does not cover damage resulting from collision, improper installation, off-road use, road hazards, the use of exhaust insulating wrap or like products, or rust occurring after installation.

Purchasers of a Product who wish to make a warranty claim based upon an alleged Product defect should email the Company at techs@aeromotiveinc.com the following information: (1) Product subject to the claim, (2) brief description of the alleged defect, (3) date and place of purchase/delivery, (4) proof of purchase (showing when and where the Product was purchased), and (5) pictures or videos of the Product. If you purchased on an online marketplace, please be sure the proof of purchase shows from whom you purchased (this information is available in your order history). In some instances, Company may instruct you to mail the Product to Company for inspection and/or repair; if such instruction is provided, Company will provide you with a prepaid shipping label. You can also contact the Company Monday – Friday, 8AM – 6:30PM CT at (913) 808-2376.

Company will replace or repair a defective Product that is covered by this warranty. This
warranty does not cover the cost of removal or installation. Company will pay for the return shipping of the Product to the purchaser.

There are no warranties which extend beyond those stated herein. ANY IMPLIED
WARRANTIES THAT MAY BE APPLICABLE TO PRODUCTS, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
LIMITED IN DURATION TO THE DURATION OF THIS WARRANTY. Some States do not
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

UNDER NO CIRCUMSTANCES SHALL THE COMPANY BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES BASED UPON BREACH OF THIS LIMITED
WARRANTY, BREACH OF CONTRACT OR STRICT LIABILITY. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights which vary from State to State.

If you have any questions about whether a seller is authorized, please contact us at (913) 808-2376.

This warranty supersedes any warranties stated in product manuals or other written materials.

Effective Date: March 16, 2026

Returns & replacements

Returns:

  • Accepted within 90 days of purchase.
  • Prior authorization required; items must be new and resaleable.
  • Call 913-808-2376 to initiate a return and get an RGA.
  • Ship unused products in original packaging with proof of purchase.
  • You pay return shipping; use a trackable method.
  • Refund excludes initial shipping fees and may include up to a 15% restocking fee.
  • Refunds processed within 5-10 days of return acceptance.

Limits of Responsibility:

  • See Product Warranty page for more info.

Reviews

In-Tank Fuel Pump, 83-97 EFI Fox Body Mustang
In-Tank Fuel Pump, 83-97 EFI Fox Body Mustang
Pump Size:
340lph
Regular price $346.41
Sale price $346.41 Regular price

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