Lethal Performance Fuel Systems: A Reference Guide

 

"Which Lethal Performance/DivisionX Fuel System do I choose?!"

 

Fuel systems aren't generally very exciting to most. They offer a 0hp gain and, minus a little bling hidden in the engine bay, they don't offer any aesthetics at a photoshoot.  BUT they are IMPORTANT. Without the proper fueling your build is at risk. DON'T SKIMP ON FUELING (or you will regret it, later)

 

We got a lot of questions related to the fuel systems on late model Mustangs. We've actually compiled an FAQ page with our most commonly asked questions (click here to check it out). 

With that said, we're going to dig a little deeper and let you know all the details on our very own Lethal Performance fuel systems: from their horsepower ratings to what size feed & return lines they come with. Check out the charts below for each vehicle group to help you decide which of our fuel systems is the right one for YOUR BUILD.

 

Click below to jump to specific applications:

 

1999-2004 Mustang GT/Mach 1/SVT Cobra

 

1999-2004 Mustang GT/Mach 1/Cobra

2V Budget Return Style Fuel System

4V Budget Return Style Fuel System

4V Budget Plus Return Style Fuel System

1999-2004 Dual Pump Return Style Fuel System

1999-2004 Triple Pump Return Style Fuel System

1999-2004 Coyote Swap Return Style Fuel System

 Applications 

1999-2004 Mustang GT

1999-2001 SVT Cobra

2003-2004 SVT Cobra

2003-2004 Mach 1

1999-2001 SVT Cobra

2003-2004 SVT Cobra

2003-2004 Mach 1

1999-2004 Mustang GT

1999-2001 SVT Cobra

2003-2004 SVT Cobra

2003-2004 Mach 1

1999-2004 Mustang GT

1999-2001 SVT Cobra

2003-2004 SVT Cobra

2003-2004 Mach 1

1999-2004 Mustang with Coyote (5.0L) swap

 Horsepower Rating (pump gas)  700-750 700-750 800-850

850-1400

(Depending on fuel pumps chosen)

1200-2000

(Depending on fuel pumps chosen)

800-850
 Pumps included  2x Walbro 255lph 2x Walbro 255lph 2x Walbro 255lph 2x Walbro 255lph 3x Walbro 255lph 2x Walbro 255lph
 Deadhead or Traditional?  N/A N/A N/A Traditional Traditional N/A
 Fuel rails included?  No No No Yes Yes No
 Feed line  Not included Not included 10an to Y-block, 8an to rails 10an to Y-block, 8an to rails 10an to Y-block, 8an to rails Not included
 Return Line  6an 6an 8an 8an 8an 6an
 Harness  Dual Harness Dual Harness Dual Harness Dual Harness Triple Harness Dual Harness
 Notes  *99-04 Mustang GT requires level sender bracket OR 03-04 Cobra OEM level sender *99-01 Cobra and 03-04 Mach 1 require level sender bracket OR 03-04 Cobra OEM level sender *99-01 Cobra and 03-04 Mach 1 require level sender bracket OR 03-04 Cobra OEM level sender *99-04 Mustang GT, 99-01 Cobra and 03-04 Mach 1 require level sender bracket OR 03-04 Cobra OEM level sender *99-04 Mustang GT, 99-01 Cobra and 03-04 Mach 1 require level sender bracket OR 03-04 Cobra OEM level sender *Fuel hat requires 03-04 Cobra OEM level sender OR any 99-04 Mustang GT, 99-01 Cobra or 03-04 Mach 1 level sender WITH the level sender bracket
 Installation Instructions & Diagram Links 

SN95 Fuel Hat Instructions

 

Budget System Installation Instructions

 

SN95 Fuel Hat Instructions

 

Budget System Installation Instructions

SN95 Fuel Hat Instructions

 

4V Budget Plus Diagram

SN95 Fuel System Instructions

 

SN95 Dual Pump Fuel System Diagram

SN95 Fuel System Instructions

 

SN95 Dual Pump Fuel System Diagram

99-04 Mustang Coyote Swap Diagram

 

 

2007-2014 Shelby GT500

 

2007-2014 Shelby GT500

 

GT500 Return Style Fuel System

2010-2012 Shelby GT500 V2 Return Style Fuel System

2013-2014 Shelby GT500 V2 Return Style Fuel System

 Applications  2007-2014 Shelby GT500

 

2010-2012 Shelby GT500

2013-2014 Shelby GT500

 Horsepower Rating (pump gas) 

Up to 2000hp

(Depending on pumps chosen)

Up to 2000hp

(Depending on pumps chosen)

Up to 2000hp

(Depending on pumps chosen)

 Pumps included 

2x Walbro 465lph

(Optional 3rd pump)

2x Walbro 465lph

(Optional 3rd pump)

2x Walbro 465lph

(Optional 3rd pump)

 Deadhead or Traditional?  Deadhead Traditional Traditional
 Fuel rails included?  Yes Yes Yes
 Feed line  10an 10an 10an
 Return Line  6an 8an 8an
 Harness 

Triple Harness

Triple Harness

Triple Harness

 Notes  *2010-2012 GT500 requires level sender bracket to be used with OEM level sender  *2010-2012 GT500 requires level sender bracket to be used with OEM level sender  
 Installation Instructions & Diagram Links 

GT500 Fuel Hat Instructions

 

GT500 Fuel System Installation Instructions

 

GT500 (Deadhead) Fuel System Diagram

GT500 Fuel Hat Instructions

 

GT500 Fuel System Installation Instructions

 

GT500 (Traditional) Fuel System Diagram

 

GT500 Fuel Hat Instructions

 

GT500 Fuel System Installation Instructions

 

GT500 (Deadhead) Fuel System Diagram

 

 

 

2011-up Mustang GT (including the Shelby GT350)

 

2011-up Mustang GT/Boss 302 and Shelby GT350

2011-2017 Mustang GT Level 1 Return Style Fuel System

2011-2017 Mustang GT Level 2 Return Style Fuel System

2015-2017 S550 Return Style Fuel System

2018+ Mustang GT Level 1 Return Style Fuel System

2018+ Mustang GT Return Style Fuel System

2016-up Shelby GT350 Return Style Fuel System

 Applications 

2011-2017 Mustang GT

2012-2013 Boss 302

 

2011-2017 Mustang GT

2012-2013 Boss 302

2015-2017 Mustang GT

2018+ Mustang GT

2018+ Mustang GT

2016-up Shelby GT350

 Horsepower Rating (pump gas)  Up to 1000

850-2000

(Depending on pumps chosen)

850-2000

(Depending on pumps chosen)

Up to 1000

850-2000

(Depending on pumps chosen)

850-2000

(Depending on pumps chosen)

 Pumps included 

2x Walbro 465lph

(Optional 3rd pump)

2x Walbro 465lph

(Optional 3rd pump)

2x Walbro 465lph

(Optional 3rd pump)

2x Walbro 465lph

(Optional 3rd pump)

2x Walbro 465lph

(Optional 3rd pump)

2x Walbro 465lph

(Optional 3rd pump)

 Deadhead or Traditional?  N/A Traditional Traditional Traditional Traditional Traditional
 Fuel rails included?  No Yes Yes Yes Yes Yes
 Feed line  8an 8an 10an 10an 10an 10an
 Return Line  6an 6an 8an 8an 8an 8an
 Harness  Triple Harness Triple Harness Triple Harness Triple Harness Triple Harness Triple Harness
 Notes  *If vehicle is equipped with a rear feed aftermarket blower, you will need a specific kit. For vehicles with a rear-fed Whipple/VMP/etc, click here. *If vehicle is equipped with an aftermarket blower, you may need a specific kit.

For vehicles with a Whipple or Edelbrock, click here.

For vehicle with a VMP w/ fuel rails, click here.

  *If vehicle is equipped with an aftermarket blower, you may need a specific kit.

For vehicles with a Whipple, click here.

For vehicle with an Edelbrock, click here.

*Main difference from Level 1 is the change to a dual regulator setup

 

**If vehicle is equipped with an aftermarket blower, you may need a specific kit.

For vehicles with a Whipple, click here.

For vehicle with an Edelbrock, click here.

 
 Installation Instructions & Diagram Links 

 

S197 Fuel Hat Instructions

 

S197 Level 1 Return Style Fuel System Diagram

 

S197 Fuel Hat Instructions

 

S197 Level 2 Return Style Fuel System Diagram

 

 

S550 Fuel Hat Instructions

 

S550 Return Style Fuel System Diagram

 

S550 Return Style Fuel System Diagram (Whipple setup)

 

 

2018+ Mustang Fuel Hat Instructions

 

2018+ Mustang GT Level 1 Return Style Fuel System Diagram

 

 

2018+ Mustang Fuel Hat Instructions

 

2018+ Mustang GT Return Style Fuel System Instructions

 

2018+ Mustang GT Return Style Fuel System Diagram

 

GT350 Fuel Hat Instructions

 

GT350 Return Style Fuel System Diagram

 

GT350 Return Style Fuel System Diagram (Whipple setup)

 

 

Have a question? Give us a shout! #teamlethal