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Holley 255 LPH Pump Module - Returnless - 12-320

Holley 255 LPH Pump Module - Returnless - 12-320

SKU: 12-320
Regular price $427.95 USD
Regular price Sale price $427.95 USD
Sale Sold out


Update the fuel system in your Dodge truck with a high performance in-tank EFI fuel pump module. These fuel modules fit inside the factory tank & feature a billet aluminum flange, Hydramat®, fuel sending unit, and high performance pump. Choose from 255 or 450 LPH (liters per hour) fuel flow & return style or returnless design. The amazing HydraMat® is Holley's patent pending design that solves the problems associated with traditional fuel pick-ups in stock fuel tanks as well as racing fuel cells. During hard cornering, acceleration, stopping, inclines, and low fuel conditions fuel runs away from the fuel pick up which introduces air into the system resulting in poor engine performance and even stalling. HydraMat is the solution! Direct Fit in the following Vehicles: 1991-1993 Dodge D150/D250/D350 (2WD Full Size Pickups) 1991-1996 Dodge Dakota (2WD & 4WD) 1991-1993 Dodge W150/W250/W350 (4WD Full Size Pickups) 1991-1993 Dodge B150/B250/B350 (Full Size Vans) 1995-1997 Dodge B1500/B2500/B3500 (Full Size Vans) 1994-1997 Dodge Ram 1500/Ram 2500/Ram 3500 (2WD & 4WD Full Size Pickups) 1991-1996 Dodge Ramcharger (2WD & 4WD - 1994-1996 are Mexico Only)


  • High Performance In-Tank EFI Fuel Pump Modules for 1991-2004 Dodge Trucks
  • Billet Aluminum Flange, Clamp & Fuel Level Sender
  • Black Anodized Finish
  • Choose from 255 or 450 LPH (liters per hour) Pump
  • Adjustable for Tank Depth
  • Choose from Return Style or Returnless Fuel Module
  • Provisions for EVAP (Evaporative Emission Control System) – See the Installation Notes
  • Inlets & Outlet Ports: -8 AN O-Ring Boss
  • New Fuel Level Sender Included
  • Optional Fill Vent Built Into Billet Aluminum Top – See the Installation Notes
  • Includes Hydramat® - 3” x 15”
  • Fits in Stock Factory Fuel Tanks
  • Ideal for Use In Gen III Hemi Engine Swaps

Year Make Model Submodel Engine Size

Amp Draw 18
Application 1991-1997 Dodge Trucks
Brand Holley
Emission Code 5
Forced Induction HP@60PSI 450
Free Flow GPH 67
Free Flow LPH 255
Fuel Sending Unit Ohms 105-5 Ohms
Fuel System EFI
Fuel Type Gasoline
GPH@60PSI 60
Material Billet Aluminum and Steel
Naturally Aspirated HP@60PSI 600
Outlet Size 8 AN
Product Type Fuel Pump Module
Pump Body Color Silver
Returnless Yes
Warning California Propsition 65
Warranty Limited 90 Day
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Policies and FAQs

Return Policy

We offer 30 days return of 100% purchase price for defective items. Return shipping and handling charges are the customers responsibility unless it is our mistake. (If shipping was included it will be deducted from the return)  If the part is wrong or defective please advise us if you would like an exchange, replacement or refund. We suggest our buyers keep tracking number delivery confirmation, and pack item securely to protect the return. If the part is lost we are unable to offer a refund. The part(s) must be returned in its original condition. Returns over 30 days may be accepted at a discounted price & offered store credit. Our return address is 774 Broad St Wadsworth, Oh 44281.


This is the line that runs from the front of the vehicle to the rear. On most vehicles it connects to a junction then you will have rear axle lines. On a few cars the intermediate lines will connect to the rear wheels. It is recommended to change the axle lines if you are replacing the intermediate lines.

Our kits include all of the solid metal lines for that section of the vehicle.

We are happy to help! Please help us to help you by going to our return form and filling out the form as best as you can in order to request a return.

  • Modern Day stands by our parts and is happy to accept returns within 30 days of purchase. Parts must be in new condition.
  • If a part arrives damaged, or is defective, Please report it to us immediately. So we can handle it for your promptly.

Yes but you will need to order in advance. All of our items are not stocked at our location. So please place your order online and we will notify you when it is ready for pick up.

Unfortunately we cannot offer single lines outside of kits

Yes, all are covered by the manufacturer's standard warranty. Most warranties cover the cost of parts. Any installation or other fees are non-refundable.

Online we accept PayPal and all major Credit Cards. If your are picking an item up we gladly accept cash.

We can only ship to your confirmed address in PayPal or your billing address if you pay with a credit card.

Orders typically Arrive within 3 to 10 days depending if it is a stocked item or something we have manufactured at time of sale.

Yes please send us a message through our custom orders page.

Yes, but items sent out of the continental U.S. may incur additional charges based on their destination

The left and right sides on a vehicle are determined as though you were sitting in the driver's seat. The left is the driver's side, and the right is the passenger's side.

Check it again tomorrow. It takes up to 1 day for the carrier to give status and a delivery date. UPS and FedEx provide delivery dates, USPS usually does not but they take no longer than 5 business days.

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