Holley Manuals & User Guides

Holley 300-923BK Modular Ultra Lo Ram Intake Manifold Plenum Top Instruction Manual

September 27, 2023

Holley Hi-Ram & Ultra Lo-Ram Intake Manifold Kits for 2011-2022 Ford 5.0L Coyote Engines 300-923BK Modular Ultra Lo Ram Intake Manifold Plenum Top Holley P/N Description 300-910 Manifold Kit, Hi-Ram…

Holley 300-718BK Lo Ram Modular Intake Manifold Kits Instruction Manual

September 25, 2023

Holley 300-718BK Lo Ram Modular Intake Manifold Kits Product Information The Holley GM GEN V LT Lo-Ram Modular Intake Manifold Kits are a set of intake manifold kits designed for…

Holley 319-500 Complete Transmission Kit Installation Guide

August 21, 2023

Holley 319-500 Complete Transmission Kit Product Information Transmission Installation Kit Congratulations on your purchase of the finest quality Transmission Installation kit available today. This installation kit is designed to adapt…

Holley 556-172 12-1x Modular Crank Trigger Kit Instruction Manual

April 5, 2023

556-172 12-1x Modular Crank Trigger Kit Instruction Manual 6.56”, Small Block Ford, 12-1x Modular Crank Trigger Kit P/N 556-172 Installation and Adjustment Instructions Introduction Congratulations on your purchase of a…

Holley 556-154 Hyperspark 2 EFI Ignition Box Instruction Manual

March 22, 2023

Holley 556-154 Hyperspark 2 EFI Ignition Box Qty Description 1 Ignition 1 Harness 4 Mounting Screws 4 Lock Washers 4 Ring Terminals WARNING! During installation, disconnect the battery cables. When…

Holley 19-591 Dodge D-Series Truck EFI Conversion Fuel Tank Instruction Manual

March 16, 2023

Holley 19-591 Dodge D-Series Truck EFI Conversion Fuel Tank Instruction Manual Parts List The following assembly instructions will assist you in installing the tank, fuel level sender, and the fuel…

Holley 12-173 Twin Pump Hanger Universal Pump Instruction Manual

January 14, 2023

Twin Pump Hanger Universal Pump Hanger Installation Instructions P/N 12-173 12-173 Twin Pump Hanger Universal Pump NOTE: Please read all instructions before proceeding with the installation of your new drop…

Holley 20-292BK Accessory Drive Kit Instruction Manual

December 25, 2022

Holley 20-292BK Accessory Drive Kit Instruction Manual Introduction Holley’s Mid-Mount complete accessory system has all accessories pulled in tighter than other accessory drives. Among the many swap friendly features is…

Holley 20-292 Premium Mid-Mount Complete Accessory System Instruction Manual

December 25, 2022

Holley 20-292 Premium Mid-Mount Complete Accessory System Dimensions Introduction Holley’s Mid-Mount complete accessory system has all accessories pulled in tighter than other accessory drives. Among the many swap friendly features…

Holley 302-65 Gen.3 Hemi Transmission Lower Structural Support Instruction Manual

December 7, 2022

Holley 302-65 Gen.3 Hemi Transmission Lower Structural Support NOTE: Read all instructions carefully before attempting the installation. APPLICATIONS Engines – All Hemi, Gen. 3 Swap Applications Oil Pans Holley Mid-sump…

Holley Sniper EFI Quickstart Manual: Installation & Setup Guide

Quickstart Manual

A comprehensive quickstart manual and installation guide for the Holley Sniper EFI Throttle Body System (models 550-510, 550-511, 550-516). This document provides essential information for installation, system requirements, wiring, calibration,…

Holley Accessory Drive Kit Installation Guide 20-163 & 20-163BK

Installation Guide

Installation guide for the Holley Accessory Drive Kit (Part Numbers 20-163 & 20-163BK) for LS engines. Includes parts list, dimensions, and step-by-step instructions for A/C, alternator, power steering, and belt…

Holley PWM Alternator Harness Installation and Configuration Guide

Installation Guide

This guide explains how to install and configure the Holley PWM Alternator Harness (Part Numbers 558-475 & 558-476) for controlling GM and Ford alternators with Pulse Width Modulation signals using…

Holley Coyote Smart Coil P/N 556-160 & 556-161: Specifications and Wiring Guide

Technical Specification

Detailed specifications, wiring instructions, and performance graphs for the Holley Coyote Smart Coil (P/N 556-160 & 556-161), designed for Holley EFI systems and high-powered applications.

Holley HP EFI Universal Retrofit Kits Installation Instructions

Installation Guide

This document provides detailed installation instructions for Holley HP EFI Universal Retrofit Kits (models 550-500 and 550-501). It covers essential steps from initial overview and required skills to fuel system…

Holley EFI Wiring Manual & Diagrams 199R10555

Wiring Manual

Comprehensive wiring manual and diagrams for Holley HP EFI and Dominator EFI Systems (Model 199R10555), covering ECU installation, pinouts, sensors, ignition systems, and programmable I/O.

Holley EFI Distributor Installation and Configuration Guide

Installation Guide

Detailed instructions for installing, configuring, removing, and aligning Holley EFI distributors. Covers sensor settings, rotor alignment, and troubleshooting for optimal engine performance with Holley EFI systems.

Holley Fuel Pump Relay Kit P/N 12-753 Installation Instructions

Installation Guide

Detailed installation instructions for the Holley Fuel Pump Relay Kit (P/N 12-753), including safety warnings and a description of the wiring diagram.

Holley Sniper 1 & 2 / Terminator X/Max EFI Wiring Diagram

Wiring Diagram

Detailed wiring diagram and installation guide for Holley Sniper 1 & 2 and Terminator X/Max EFI systems, covering connections for Vintage Air GEN IV ECU, cooling fans, and A/C compressor…

Holley SNIPER Gen 5 Camaro Twin Pump Fuel Module Installation Guide (12-350)

Installation Guide

Comprehensive installation instructions for the Holley SNIPER Gen 5 Camaro Twin Pump Fuel Module (P/N 12-350). Covers parts included, required items, step-by-step installation, plumbing, and wiring for performance vehicles.

Holley SNIPER Gen 5 Camaro Twin Pump Fuel Module Installation Guide (P/N 12-350)

Installation Guide

Comprehensive installation guide for the Holley SNIPER Gen 5 Camaro Twin Pump Fuel Module (P/N 12-350). Covers parts included, required items, module I/O, installation steps, plumbing, wiring, and safety precautions.

Holley Gen 5 Camaro Twin Pump Fuel Module Installation Guide

Installation Guide

Installation guide for the Holley Gen 5 Camaro Twin Pump Fuel Module (P/Ns 12-351). Covers parts included, required items, and step-by-step instructions for removal, installation, plumbing, and wiring.