Home

Explore

View Cart

Deals

Saved

Suggested searches

Plant-based protein powders
Vegan leather handbags
Bedroom decor
Waterproof jackets
Hoodies

Learn more about how we use your data to personalize your experience and ads. Recommendations are for informational purposes only.

The Tuner Store

Holley Pro-Dash Input/Output Harness

Holley Pro-Dash Input/Output Harness

The Tuner Store

Pro-Dash Input/Output Harness

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$299.95$337.95

11% off

Color

Black

Quantity

Product description loading

Product description loading

This is the product description text that will appear here.

Shopping designed around you.

Start selling

For brands

For creators

Build your store

Information

Shop Pay

Help center

Social

X (Twitter)

Instagram

Legal

Terms of Service

Privacy Policy

Your Privacy Choices

Powered by

|

Start selling for free

Language

© Shopify Inc. 2026

Quantity

1

You might also like

Holley GM 58X EFI Harness Kit

11% off

The Tuner Store

GM 58X EFI Harness Kit

$949.95$1,068.95

Big3RacingParts

Holley EFI- 558-401 Dominator EFI Auxiliary Harness

Holley Dominator ECU 26 Pin J1B (P1B) Extension Harness

17% off

EFI Conversions

J1B P1B 26-pin Extension Harness for Holley EFI Dominator ECU

Holley Die Cast EFI By Pass Style Fuel Pressure Regulators

7% off

The Tuner Store

Die Cast EFI By Pass Style Fuel Pressure Regulators

Holley Terminator EFI Input/Output Kit

The Tuner Store

Terminator EFI Input/Output Kit

Holley EFI 6.86" Pro Dash

24% off

The Tuner Store

Holley EFI 6.86" Pro Dash

$1,146.95$1,518.95

Holley EFI CAN Input/Output Module - Without Harness

11% off

The Tuner Store

Holley EFI CAN Input/Output Module - Without Harness

MailOrder Tuner

4.9

(780)

MPVI2 Standard and Pro Models in stock.,Hp Tuners Idle Tuning - Mail Order Tuner Ls1 Programmer, Ls Pcm Tuning Software, Tuning Software For Ls Motors

MPVI2 Standard and Pro Models in stock.,Hp Tuners Idle Tuning - Mail Order Tuner Ls1 Programmer, Ls Pcm Tuning Software, Tuning Software For Ls Motors

Full Size Truck Dyno Tuning - Pcm of NC

Full Size Truck Dyno Tuning - 2003-2013 Full Size Truck Electric Dual Fan conversion kit , Tuning Software For Ls Motors, Hp Tuners Idle Tuning, Custom truck tuning

Holley LS Coil Extension Harnesses

11% off

The Tuner Store

LS Coil Extension Harnesses

Pro Performance

Holley EFI Terminator X Max - LS with 4L60/4L80 Trans Control

Main Power Harness 30A for Holley EFI ECUs

17% off

EFI Conversions

Main Power Harness 30A for Holley EFI ECUs

Holley EFI Terminator X - GM LS1/LS6 - 24x Crank - 1x Cam - EV6 Injectors - USB/CAN Tuning Cable

25% off

The Tuner Store

EFI Terminator X - GM LS1/LS6 - 24x Crank - 1x Cam - EV6 Injectors - USB/CAN Tuning Cable

$1,231.95$1,631.95

Holley Sniper EFI - Stock Replacement Fuel Tank - Chevrolet GMC C/K Truck - GM11B

10% off

The Tuner Store

Holley Sniper EFI - Stock Replacement Fuel Tank - Chevrolet GMC C/K Truck - GM11B

Holley Sniper EFI Remote IAC Kit

11% off

The Tuner Store

Sniper EFI Remote IAC Kit

Holley Digital Dash I/O Adapter w/Terminated Vehicle Harness

11% off

The Tuner Store

Digital Dash I/O Adapter w/Terminated Vehicle Harness

Holley Dominator ECU 26 Pin J4 (P4) 4L60E 4L80E Transmission Extension Harness

17% off

EFI Conversions

J4 P4 26-pin 4L60e 4L80e Transmission Extension Harness for Holley EFI Dominator ECU

Holley Universal 6 Cylinder Injector Harness

11% off

The Tuner Store

Universal 6 Cylinder Injector Harness

Holley EFI Terminator X Max - Service ECU

11% off

The Tuner Store

Holley EFI Terminator X Max - Service ECU

$1,299.95$1,462.95

Complete Street Performance

4.8

(1.2K)

Product Image 1

Product Image 1

Product Image 1

Product Image 1

Product Image 1

Exclusive offer available

ICT Billet

Power Harness Wire Extension 60" for Holley EFI

Holley Dominator ECU 26 Pin J3 (P3) Drive by Wire Extension Harness

17% off

EFI Conversions

J3 P3 26-pin Drive by Wire Extension Harness for Holley EFI Dominator ECU

Holley Dominator ECU 34 Pin J2A (P2A) Extension Harness

17% off

EFI Conversions

J2A P2A 34-pin Extension Harness for Holley EFI Dominator ECU

Holley Sniper EFI BBD for 1971-1986 Jeep CJ - Shiny

25% off

The Tuner Store

Holley Sniper EFI BBD for 1971-1986 Jeep CJ - Shiny

$1,231.95$1,631.95

Holley EFI Terminator X Wideband Adapter Harness

The Tuner Store

Holley EFI Terminator X Wideband Adapter Harness

ICT Billet Holley Dominator EFI vehicle management system unit in black with branding

Exclusive offer available

ICT Billet

Holley Dominator ECU

Product Image 1

11% off

Complete Street Performance

Holley 558-103 - Main Wiring Harness LS2 & LS3

Fuel Injector Sub Harness Pigtail for Holley EFI

17% off

EFI Conversions

Fuel Injector Sub Harness Pigtail for Holley EFI

Holley EFI Fuel Tank Modules - 255 LPH - 1963-1967 Corvette

11% off

The Tuner Store

Holley EFI Fuel Tank Modules - 255 LPH - 1963-1967 Corvette

Holley HyperSpark Kit w/ 565-304 - Chrysler 318 / 360

11% off

The Tuner Store

HyperSpark Kit w/ 565-304 - Chrysler 318 / 360

$1,049.95$1,181.95

Holley EFI Terminator X Max - Gen IV 58x Crank - 4x Cam - EV6 Injectors - Drive-By-Wire Throttle Body and Transmission Contro

24% off

The Tuner Store

EFI Terminator X Max - Gen IV 58x Crank - 4x Cam - EV6 Injectors - Drive-By-Wire Throttle Body and Transmission Control - USB/CAN Tuning Cable

$1,826.95$2,418.95

The Tuning School

The Tuning School

5

(47)

HP Tuners MPVI4

HP Tuners MPVI4

AEM X-Series OBDII Wideband UEGO AFR Controller Gauge

HP Tuners GM E90/T93 Upgrade Kit

Holley Universal MPFI Main Harness - GM DBW Throttle Body Control - GM 4L60E/80E Transmission Control - EV1 Injectors - 3.5

24% off

The Tuner Store

Universal MPFI Main Harness - GM DBW Throttle Body Control - GM 4L60E/80E Transmission Control - EV1 Injectors - 3.5 in. Touchscreen

$1,868.95$2,474.95

Holley EFI Terminator X Service ECU

11% off

The Tuner Store

Holley EFI Terminator X Service ECU

$913.95$1,028.95

Holley Ford Coyote Coil Harness

11% off

The Tuner Store

Ford Coyote Coil Harness

Product Image 1

11% off

Complete Street Performance

Holley 558-102 - Main Wiring Harness LS1 & LS6

2% off

Pro Touring Store

Holley Dominator EFI ECU Only 554-114

$2,499.95$2,542.00

Holley EFI Fuel Tank Modules - 350 LPH - B-Body Vehicles

42% off

The Tuner Store

Holley EFI Fuel Tank Modules - 350 LPH - B-Body Vehicles

HP Tuners PROLINK+ standalone data logging cable for MPVI3 and MPVI4

The Tuner Store

PROLINK+ Cable for MPVI3 & MPVI4

(2)

Holley EFI Terminator X Max - LS1/LS624x Crank - 1x Cam - EV6 Injectors - Drive-By-Wire Throttle Body and Transmission Contro

24% off

The Tuner Store

EFI Terminator X Max - LS1/LS624x Crank - 1x Cam - EV6 Injectors - Drive-By-Wire Throttle Body and Transmission Control - USB/CAN Tuning Cable

$1,826.95$2,418.95

Product Image 1

11% off

Complete Street Performance

Holley EFI 554-114 - Integrated electronic transmission control, drive by wire throttle control, dual wideband oxygen sensor capability, extensive amount of inputs and outputs for various combinations, and much more

(1)

$2,499.95$2,812.95

Gotham Motorworks

Holley EFI HiRam Lo Ram LS LSx Injector Harness EV6 Connectors Terminator X

EVILENERGY

EVILENERGY

4.3

(2.2K)

EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black - EVILENERGY

EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black - EVILENERGY

[1 PC]

[1PC]

[8AN to 3/8 Inch,45 Degree]

Holley EFI Fuel Tank Modules - 255 LPH 1968-1972 GM A-Body Vehicles

11% off

The Tuner Store

Holley EFI Fuel Tank Modules - 255 LPH 1968-1972 GM A-Body Vehicles

Edge EvoHT2 with ECM Unlock Tool for 2017-2019 GM L5P Duramax

11% off

The Tuner Store

Edge EvoHT2 with ECM Unlock Tool for 2017-2019 GM L5P Duramax

Holley EFI Terminator X Max - Gen IV 58x Crank - 4x Cam - EV6 Injectors - Transmission Control - USB/CAN Tuning Cable

24% off

The Tuner Store

EFI Terminator X Max - Gen IV 58x Crank - 4x Cam - EV6 Injectors - Transmission Control - USB/CAN Tuning Cable

$1,656.95$2,193.95

Holley GM LS 24X EFI Harness Kit

11% off

The Tuner Store

GM LS 24X EFI Harness Kit

$1,065.95$1,199.95

Speed Engineering

Speed Engineering

4.8

(4.8K)

Holley EFI Oxygen Sensor

11% off

The Tuner Store

Holley EFI Oxygen Sensor

Holley 1/4" EGT Probe, Open Tip - 90Deg 18.50In

7% off

The Tuner Store

1/4" EGT Probe, Open Tip - 90DEG 18.50IN

Billys Speed Shop

Holley EFI LS Main Harness to LS3-style MAP Sensor Adapter - Adapter Harness

Holley EFI 7" Digital Dash

25% off

The Tuner Store

Holley EFI 7" Digital Dash

$821.95$1,088.95

Holley EFI Fuel Tank Modules - 255 LPH 1964 - 1967 GM A-Body Vehicles

11% off

The Tuner Store

Holley EFI Fuel Tank Modules - 255 LPH 1964 - 1967 GM A-Body Vehicles

Holley Terminator X Performance Fuel Injectors - Set of Eight - PICO/EV6 - 220 lb/hr - High Impedance

11% off

The Tuner Store

Terminator X Performance Fuel Injectors - Set of Eight - PICO/EV6 - 220 lb/hr - High Impedance

Holley EFI LS Main Harness to LS3-style MAP Sensor Adapter

The Tuner Store

Holley EFI LS Main Harness to LS3-style MAP Sensor Adapter

Holley Input/Output Connector

The Tuner Store

Input/Output Connector

Holley Wideband Connector - Main Harness Side (10-PACK)

The Tuner Store

Wideband Connector - Main Harness Side (10-PACK)

Holley EFI 12.3" Standalone Pro Dash

24% off

The Tuner Store

Holley EFI 12.3" Standalone Pro Dash

$2,038.95$2,699.95

Holley EFI Fuel Tank Modules - 350 LPH - 1973-1987 GM C/K Series

11% off

The Tuner Store

Holley EFI Fuel Tank Modules - 350 LPH - 1973-1987 GM C/K Series

Valvetronic Designs

Valvetronic Designs

Valvetronic Designs

4.8

(2.6K)

Holley EFI Terminator X Stealth GM LS 4150 - Shiny - 24X Crank - 4 Injectors - 650 HP

24% off

The Tuner Store

EFI Terminator X Stealth GM LS 4150 - Shiny - 24X Crank - 4 Injectors - 650 HP

$2,038.95$2,699.95

Holley Terminator X Max ECU 26 Pin J4 (P4) GM 4L60E 4L80E Transmission Extension Harness

17% off

EFI Conversions

4L60e 4L80e GM Transmission Extension Harness for 26 Pin J4 P4 Holley EFI Terminator X Max ECU

Holley Dominator ECU 26 Pin J2B (P2B) Extension Harness

17% off

EFI Conversions

J2B P2B 26-pin Extension Harness for Holley EFI Dominator ECU

Holley EFI Fuel Tank Module - 350 LPH - GM G-Body Vehicles

11% off

The Tuner Store

Holley EFI Fuel Tank Module - 350 LPH - GM G-Body Vehicles

Holley Gen III HEMI Hi-Ram EFI Manifold Base - Gen III HEMI EFI Manifold Base - As Cast Finish - Fits 2009-up 5.7L, 2005-2010

11% off

The Tuner Store

Gen III Hemi Hi-Ram EFI Manifold Base - Gen III Hemi EFI Manifold Base - As Cast Finish - Fits 2009-up 5.7L, 2005-2010 6.1L, and 2011-up 6.4L

$999.95$1,124.95

11% off

Speedzone Performance LLC

Holley EFI 12.3" Pro Dash

(1)

$2,199.95$2,474.95

Richard Holdener Performance

4.9

(514)

Truck Plus Cam and Spring Package for LS truck engines - Richard Holdener Performance

Truck Plus Cam and Spring Package for LS truck engines - Richard Holdener Performance

LS7 Lifters and Trays LS/LT/4.8/5.3/6.0 - Richard Holdener Performance

Truck Plus Cam and Spring Package for LS truck engines - Richard Holdener Performance

BTR CHROMOLY ONE PIECE PUSHRODS - 5/16" DIAMETER - .080 WALL THICKNESS - 7.400" - Richard Holdener Performance

Holley Terminator X Performance Fuel Injectors - Set of Eight - PICO/EV6 - 76 lb/hr - High Impedance

11% off

The Tuner Store

Terminator X Performance Fuel Injectors - Set of Eight - PICO/EV6 - 76 lb/hr - High Impedance

HP Tuners GM E41 ECM Upgrade Kit

The Tuner Store

GM E41 ECM Upgrade Kit

Holley EFI Benchtop Harness

11% off

The Tuner Store

Holley EFI Benchtop Harness

15% off

Big3RacingParts

Holley EFI- 553-112 6.86" Pro Dash

$1,146.95$1,349.95

Ignition Coil (IC) Sub Harness EVEN Pigtail for Holley EFI

17% off

EFI Conversions

Ignition Coil (IC) Sub Harness EVEN Pigtail for Holley EFI

Holley Dominator ECU 34 Pin J1A (P1A) Extension Harness

17% off

EFI Conversions

J1A P1A 34-pin Extension Harness for Holley EFI Dominator ECU

Holley Sniper EFI - Stock Replacement Fuel Tank - GM G-Body - GM306A

9% off

The Tuner Store

Holley Sniper EFI - Stock Replacement Fuel Tank - GM G-Body - GM306A

Holley OBDII Splitter Cable

The Tuner Store

OBDII Splitter Cable

Holley Pro Dash Service Harness

11% off

The Tuner Store

Pro Dash Service Harness

Big3RacingParts

Holley EFI- 558-308 Main Power Harness for HP, Dominator EFI

LS1 6 (24X X) ENGINE MAIN HARNESS.jpg

CRUZ Performance

Holley EFI LS1/6 (24X/1X) Engine Main Harness

Holley EFI Fuel Tank Modules - 255 LPH - GM G-Body Vehicles

11% off

The Tuner Store

Holley EFI Fuel Tank Modules - 255 LPH - GM G-Body Vehicles

Holley EFI CAN Input/Output Module Kit

11% off

The Tuner Store

Holley EFI CAN Input/Output Module Kit

Holley GM LS1/LS6 (24x crank sensor) with Jetronic/Minitimer (Bosch type) connectors on injector harness, Includes NTK Oxygen

24% off

The Tuner Store

GM LS1/LS6 (24x crank sensor) with Jetronic/Minitimer (Bosch type) connectors on injector harness, Includes NTK Oxygen Sensor

$2,633.95$3,487.95

Inputs/Outputs I/O Pigtail for Holley EFI

17% off

EFI Conversions

Inputs/Outputs I/O Pigtail for Holley EFI

(1)

Holley Terminator X Performance Fuel Injectors - Set of Eight - PICO/EV6 - 100 lb/hr - High Impedance

11% off

The Tuner Store

Terminator X Performance Fuel Injectors - Set of Eight - PICO/EV6 - 100 lb/hr - High Impedance

Holley Terminator Stealth 2x4 MAIN HARNESS

11% off

The Tuner Store

Terminator Stealth 2x4 MAIN HARNESS

Off-Board Power Holley EFI Harness HP Dominator ECU

BenchForce

Off-Board Power Holley EFI Harness HP Dominator ECU

Cleetus Mcfarland

Cleetus Mcfarland

4.9

(38.4K)

Big3RacingParts

Holley EFI- 558-408 j2A, j2B, j3, j4 Connector & Pin Kit

Holley Sniper 2 EFI Upgrade Kit w/ Regulator - Polished

24% off

The Tuner Store

Sniper 2 EFI Upgrade Kit w/ Regulator - Polished

$1,146.95$1,518.95

Holley Sniper EFI Air Cleaner Drop Base - Chrome

The Tuner Store

Sniper EFI Air Cleaner Drop Base - Chrome

Holley EFI Terminator X Max Stealth 4150 - Black Pre-2009 GM 4L60E/4L80E Transmission Control - 650 HP

24% off

The Tuner Store

EFI Terminator X Max Stealth 4150 - Black Pre-2009 GM 4L60E/4L80E Transmission Control - 650 HP

$2,123.95$2,812.95

Product Image 1

11% off

Complete Street Performance

Holley EFI 554-114LW - EFI Lightweight Dominator ECU

$2,649.95$2,981.95

Plug-and-play installation simplifies setup and reduces wiring errors
Supports 2009 GM 4L60 and 4L60E engines for broad compatibility
Designed for Dominator ECU to ensure proper integration with advanced tuning systems
Handles internal turbine speed sensor and updated valve body range selector wiring for accurate performance data
Requires software and firmware updates for optimal compatibility and function

Summarized by Shop

Pro-Dash Input/Output Harness

Overview
Expanding on our Transmission Control options from Holley EFI. This new harness 558-455 from Holley EFI provides plug and play transmission control for the 2009+ GM 4L60 when used with a Dominator ECU. The 2009+ GM 4L60E contains an internal turbine speed sensor, which was not on the previous model yea

Compatibility: 2009 GM 4L60 and 4L60E engines
ECU Requirement: Dominator ECU (software version 5.0 build 100 or higher, firmware 5.0 build 110 or higher)
Color: Multicolor (Black, Red, Blue, Green, White, Gray, Silver)
Item Condition: New
Manufacturer Type: Aftermarket, OEM, Genuine
Pattern: Solid

Summarized by Shop

The Tuner Store

4.9 (80)