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Transferflow - Premier American-Made Fuel Systems
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    • TRANSFER FLOW NEWS & ARTICLES
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    • IN-BED AUXILIARY FUEL TANKS
    • IN-BED AUXILIARY TANK & TOOL BOX COMBOS
    • REFUELING TANK SYSTEMS
    • REFUELING TANK & TOOL BOX COMBOS
    • DIESEL REFUELING TANKS
    • REPLACEMENT FUEL TANKS
    • FILLER NECK KITS
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  • TRANSFER FLOW NEWS & ARTICLES
  • IN-BED AUXILIARY FUEL TANKS
  • IN-BED AUXILIARY TANK & TOOL BOX COMBOS
  • REFUELING TANK SYSTEMS
  • REFUELING TANK & TOOL BOX COMBOS
  • DIESEL REFUELING TANKS
  • REPLACEMENT FUEL TANKS
  • FILLER NECK KITS
  • FUEL TAP KITS
  • TFI GEAR
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  • Fuel Tank Systems>
  • PARTS

PARTS

We offer an assortment of parts to purchase.

Transfer Flow aftermarket filler neck parts are intended for installation only on vehicles purchased from a dealer or other source, or used vehicles. For more information about ensuring the legal installation of this product, see Procedures for Exemption of Modified and Add-On Parts.

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Filler Neck Parts - DEF Filler Neck
Filler Neck Parts - DEF Filler Neck

Universal DEF Filler Neck

$120.57/EA
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PROPRIETARY - Facet Pump and Filter
PROPRIETARY - Facet Pump and Filter
$121.15/EA
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Wire Harness with Switch for Refueling Tanks
Wire Harness with Switch for Refueling Tanks
$126.19/EA
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Filler Neck Part - Straight Diesel Filler Neck with 5/8" Vent - 5"
Filler Neck Part - Straight Diesel Filler Neck with 5/8" Vent - 5"
$162.85/EA
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GPI® EZ 8 Refueling Pump
GPI® EZ 8 Refueling Pump
$204.75/EA
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WARRANTY ONLY - Replacement Toolbox Latch Kit (Paddle Handle)
WARRANTY ONLY - Replacement Toolbox Latch Kit (Paddle Handle)
$216.44/EA
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PROPRIETARY - TRAX 3/TRAX 4 Universal Aux Pump Replacement Kit (Facet)
PROPRIETARY - TRAX 3/TRAX 4 Universal Aux Pump Replacement Kit (Facet)
$241.15/EA
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15 GPM GPI® Refueling Pump (Fits 50, 82, 100, 109 and 50/50 split refueling tank systems)
15 GPM GPI® Refueling Pump (Fits 50, 82, 100, 109 and 50/50 split refueling tank systems)
$358.75/EA
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PROPRIETARY - Trax 4 Upgrade Kit (Module and Harness)
PROPRIETARY - Trax 4 Upgrade Kit (Module and Harness)
$405.71/EA
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15 GPM GPI® Refueling Pump (Fits 50- and 80-gallon diesel refueling tanks)
15 GPM GPI® Refueling Pump (Fits 50- and 80-gallon diesel refueling tanks)
$478.63/EA
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From Our Customers

Trustpilot

Transfer Flow's story began in 1983 in the beautiful and historic town of Chico, California. Former General Motors Engineer Bill Gaines founded the company as an OEM fuel system supplier for the motorhome and travel trailer industry. Transfer Flow quickly expanded into the mobility, work truck, and mainstream automotive industries. By 1994, the company relocated to a 35,000 square foot manufacturing facility as demand continued to grow, with an additional 20,000 square foot facility built in 2000. In 2023, Transfer Flow expanded eastward and opened a 37,000 square foot warehouse and manufacturing facility in Algood, Tennessee.

Today, Transfer Flow continues to invest in new technology and state-of-the-art manufacturing equipment, while employing a dedicated and skilled team of more than 100 people from across Northern California and middle Tennessee.

Products

  • In-Bed Auxilary Fuel Tanks
  • In-Bed Auxiliary Fuel Tank & Toolbox Combos
  • Refueling Tank Systems
  • Refueling Tank & Toolbox Combos
  • Diesel Refueling Tanks
  • Replacement Fuel Tanks
  • Filler Neck Kits
  • Fuel Tap Kits
  • TFI Gear
  • Accessories
  • Parts
  • ProTech® Cross Body Tool Boxes

Learn

  • About Transfer Flow
  • TRAX 4™
  • Find an Installer
  • Request a Catalog
  • Fuel System Regulations
  • Frequenty Asked Questions
  • OEM & Custom Parts
  • News & Articles
  • 6-Year Warranty
  • Careers
  • Suggest a Product
  • Become A Dealer or Installer
  • 2025 Photo Contest

Resources

  • Downloads

Account

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  • My Account

Terms & Policies

  • Shipping Policy
  • Returns
  • Terms & Conditions
  • Legal Notices

Contact

Transfer Flow, Inc.
1444 Fortress Street
Chico, CA 95973
(800) 442-0056
tanks@TransferFlow.com techsupport@transferflow.com
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