FASS D-Max Flow Enhancer Pump - Duramax 6.6L 2001-2010

In stock
Special Price $417.05 was $439.00

Fuel Delivery for Budget Minded Duramax Owners


  • Reduces Factory CP3 Workload
  • Delivers Fuel Under Pressure
  • Improves Fuel Flow
  • Improves Fuel Delivery and Performance
  • Reduces Air and Vapor
  • Budget Minded Alternative
  • Simple Installation
  • Made in the USA


  • 2001 - 2010 Chevy Silverado HD 6.6L Duramax Diesels
  • 2001 - 2010 GMC Sierra HD 6.6L Duramax Diesels


Duramax diesel engines do not come with a factory lift pump, this is why Duramax owners see such great performance and economy gains after installing an aftermarket diesel fuel lift pump. When the factory CP3 injection pump pulls fuel under a vacuum it can introduce air and vapor into your fuel, which can lead to injector failure. The D-Max Flow Enhancer has been designed to provide your Duramax engine with a constant 8 PSI fuel pressure, aiding the injection system by reducing the amount of work your factory injection pump has to perform, extending its expected life and improving performance gains from aftermarket tuning products. Since the D-Max Flow Enhancer is a “pusher” pump, all fuel is placed under pressure, helping prevent the introduction of air and vapor.

The D-Max is well designed for stock trucks or budget-minded shoppers, however, it's suggested that Duramax diesel owners install one of our Titanium Series pumps if you have several fueling upgrades or if you are looking for improved filtration and all the benefits that come with our top selling Titanium Series FASS Diesel Pumps.

The FASS DMAX-7001 Dura-Max Flow Enhancer

This DMAX-7001 works on the following GM vehicles:

  • 2001 to 2010 6.6L Duramax LB7, LLY, LBZ & LMM motors.

THE FASS DMAX-7001 Flow Enhancer Fuel Pump benefits:

  • Sold as a complete kit ready for installation.
  • Installed as a pusher style pump to supply fuel to your 6.6L Duramax fuel injection pump.
  • Reduces the strain placed upon your injection pump.
  • Uses a Heavy Duty motor that provides High Torque to Gear Ratio to Ensure Cold Weather Starts.
  • Heavy Duty motor that is segregated from the fuel to prolong the life of the motor.
  • Flows up to 70 gallons per hour.
  • Strong enough to push B-20 and B-50 Fuels in the warmer months of the year.
  • Creates “Positive” Fuel Flow Eliminates Suction for the Injection Pump.
  • Drastically reduces Air/Vapor in the fuel caused by suction.
  • Works in conjunction with the Stock Fuel Filter.
  • Easier Start-Ups Reduced Maintenance Costs.
  • Increased “Positive” Fuel Flow.
  • Preset Pressure is 8 to 10 PSI.
  • Integrates the FASS Silencing Technology.
  • Backed By a 4 Year Manufacturers Warranty.

NOTE: The FASS Fuel Systems Dura-Max Flow Enhancer Fuel Pumps are for Stock Power Applications. The installation of a FASS STK-1002 Suction Tube Kit will help to resolve any fuel flow issues encountered with the stock fuel module.

FASS D-Max 7001 GM Flow Enhancer is MADE IN THE USA!

More Information
Brand FASS Diesel Fuel Systems
Diesel Engine Duramax 6.6L LMM 2007.5-10, Duramax 6.6L LBZ 2006-2007, Duramax 6.6L LLY 2004.5-2005, Duramax 6.6L LB7 2001-2004
OEM Make GMC, Chevrolet
OEM Model Sierra/Denali 2500, Sierra/Denali 3500, Sierra/Denali 3500 Chassis Cab, Silverado 2500HD, Silverado 3500HD, Silverado 3500HD Chassis Cab
Specific Year 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001

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Exclusive Freedom Diesel Performance Discounts

Save $45 On Any Order Over $699 w/ Coupon Code SAVE45QUICK


All of our packages include multiple related items at a special package discount. Our packages are designed to make your life easier, usually including all the parts you need to achieve a specific modification.

Price Matching Beating!

We want to make sure you get the best deal possible on your parts. We do our best to ensure we have the best prices in the industy, however, if you find an item cheaper, let us know and we will happily match or beat the price.

Discounts For Shops & Dealers

If you are an installation shop or dealer, give us a call or email for details on our dealer program. We are able to discount most items for shops.

Phone: 855-432-4733 9 AM - 6 PM EST Monday - Friday
Email: [email protected]

We Strive For Extremely Quick Shipping.

Whether you need a part to fix a downed truck, a performance part to get the edge on your competitors on race day, or just something to improve the look or functionality of your vehicle; freedom diesel performance you covered!

We understand the only reason you are purchasing a part, is because you really need it or really want it. We do everything in our power to ensure you get the purchased item as soon as possible.

*** Orders placed before 2 PM Est - Usually ship the same day. ***

Estimated Delivery Times:

- Tuners / Programmers by themselves - 2 to 3 Business Days

- Performance / Race Packages - 2 to 5 Business Days

- General Diesel Performance Parts - 2 to 5 Business Days 

- Lighting, Accessories, Etc - 2 to 7 Business Days 

(Alaska / Hawaii Add 3 Business Days)

Easy Return / Exchange Process

If for some reason, you order the incorrect product, or do not need the product prior to using it, we will accept it back as a return for refund or exchange up to 30 days from delivery. Must be in new, un-used condition with original packaging.

Due to credit card processing fees, shipping, and wear and tear to the packaging often occuring during shipping, returns may be subject to a 20% restocking fee.

If you need to setup a return or exchange, please contact us for an RMA#

Warranty Process

If the product you receive is damaged or defective, please contact us immediately for assistance. In most cases, we can send you a return label and fix the problem very quickly.