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Holley Manuals & User Guides

Holley is a leading manufacturer of high-performance aftermarket automotive parts, specializing in fuel systems, EFI, carburetors, and engine components.

Tip: include the full model number printed on your Holley label for the best match.

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Official site: https://www.holley.com/
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Holley manuals

Latest manuals from manuals+ curated for this brand.

Holley Fuel Rails for OE Style Ford 7.3L Godzilla intakes Instruction Manual

November 22, 2022

Holley Fuel Rails for OE Style Ford 7.3L Godzilla intakes APPLICATIONS P/N 534-265 - Fits Ford 7.3L Godzilla factory intakes when using short and tall injectors: Includes (x4) -6 to…

Holley 553-342 Instrument Camaro Bezel Kit Instruction Manual

November 9, 2022

Holley 553-342 Instrument Camaro Bezel Kit PRE-INSTALLATION CONSIDERATIONS This instrument bezel kit is designed to replace the stock instrument cluster and bezel in a 1970-1978 Camaro. It will accept (2)…

Holley SNIPER Twin Pump Hanger Universal Pump Hanger Installation Guide

November 4, 2022

Holley SNIPER Twin Pump Hanger Universal Pump Hanger Installation Guide Twin Pump Hanger Universal Pump Hanger Installation Instructions NOTE: Please read all instructions before proceeding with the installation of your…

Holley 97-158 Tensioner Cover Instructions

October 29, 2022

97-158 Tensioner Cover Instructions 97-158 Tensioner Cover Tensioner Cover 97-158 (Black) 97-157 (Polished) Works ONLY with Gates 38163 tensioner. The cover is to be installed after the belt has been…

Holley 12-351 Gen 5 Camaro Twin Pump Fuel Module Instructions

October 27, 2022

Holley 12-351 Gen 5 Camaro Twin Pump Fuel Module Gen 5 Camaro Twin Pump Fuel Module P/Ns 12-351 NOTE: Please read all instructions before proceeding with the installation of your…

Holley 350 Factory Upgrade Module Wiring/Plumbing Instructions

October 26, 2022

Holley 350 Factory Upgrade Module Wiring/Plumbing 350 Factory Upgrade Module Wiring/Plumbing Instructions P/N’s: 12-328, 12-329, 12-330, 12-331, 12-332, 12-333, & 12-334 NOTE: Please read all instructions before proceeding with the…

Holley 289-302 FORD Intake Manifold Instruction Manual

October 25, 2022

Holley 289-302 FORD Intake Manifold INSTALLATION INSTRUCTIONS P/N 199R12045 APPLICATIONS: The P/N 300-277 intake manifold is designed for 1962 and later 221-260-289-302 (non-Boss) cid Ford V-8 engines. This manifold WILL…

Holley Drop-In Fuel Tank Hanger Mopar Truck 1991-2004 User Guide

October 22, 2022

Drop-In Fuel Tank Hanger Mopar Truck 1991-2004 P/Ns 12-320, 12-321, 12-322, 12-323, 12-324, & 12-325 NOTE: Please read all instructions before proceeding with the installation of your new drop-in fuel…

Holley Terminator X Wiring Diagram: Proper Installation for 79-93 Ford Mustang EFI Harness Kit

October 19, 2022

The Holley Terminator X Wiring Diagram: Proper Installation for 79-93 Ford Mustang EFI Harness Kit Instructions is a comprehensive guide for installing the Holley 79-93 Ford Mustang EFI Harness Kit.…

20-180BK Complete Holley Mid-Mount Accessory Drive Kit Instruction Manual

September 17, 2022

20-180BK Complete Holley Mid-Mount Accessory Drive Kit Instruction Manual 20-180BK Complete Holley Mid-Mount Accessory Drive Kit Complete Holley Mid-Mount Accessory Drive Kit Part Numbers: 20-180, 20-180BK, 20-180P, 20-185, 20-185BK, 20-185P,…

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.

Holley Gen 5 Camaro Twin Pump Fuel Module Installation Guide

Installation Guide

Comprehensive installation guide for the Holley Gen 5 Camaro Twin Pump Fuel Module (P/Ns 12-351), detailing parts included, required tools, and step-by-step instructions for fuel system plumbing and wiring.

Holley Fuel Pressure Regulator Installation Instructions (12-881, 12-882, 12-886, 12-887)

installation guide

Detailed installation guide for Holley Fuel Pressure Regulators, models 12-881, 12-882, 12-886, and 12-887. Covers setup, adjustments, and safety warnings for automotive fuel systems.

Holley HP and Dominator EFI Systems Wiring Manual & Diagrams

Wiring Manual

Comprehensive wiring manual and diagrams for Holley HP and Dominator EFI systems, detailing ECU installation, connectors, pinouts, sensor connections, ignition systems, and programmable inputs/outputs for automotive performance tuning.

Holley V5 Software Update Overview: Custom Injector Setup and Active Speed Management

software manual

A comprehensive guide to the updates in Holley V5 software, focusing on custom injector setup features like multiple injector sets, individual cylinder timing, and staging assist. It also details the…

Holley Carburetor Specification Manual: Models 2010-4500

Technical Specification

Comprehensive specification manual for Holley carburetors, including models 2010, 2300, 4010, 4011, 4150, 4160, 4165, 4175, and 4500. Provides detailed adjustment specifications for each model.