ZZ383 Crate Engine 12498772 and 19154775 Specifications - Installation and Service Guide

Oct 29, 2026

ZZ383 long block specification sheet for Chevrolet Performance Parts, covering engine and related components. The guide explains what the publication is for, how to verify kit contents, and how the ZZ383 engine is built and how it can be installed in applications originally using 265–400ci small block Chevrolet V-8 engines. It highlights that procedures may vary by vehicle, may require transferred or additional components, and does not replace GM service manuals. It also includes warranty, legal, and emissions compliance cautions and safety precautions.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages30

Reading Time1 h 16 min

AccessFree to download

Package contents

Component information

ZZ383 engine specifications

Additional parts you may need to purchase

Torque specifications

Service parts list

Legal and emissions information

| | | | | --- | --- | --- | | ZZ383 Crate Engine 12498772 and 19154775 Specifications
Specifications Part Number 88962517
This ZZ383 long block specification sheet should be used in conjunction with the 383 short block specification sheet, part number 19172223.
Thank you for choosing Chevrolet Performance Parts as your high performance source. Chevrolet Performance Parts is committed to providing proven, innovative performance technology that is truly.... more than just power. Chevrolet Performance Parts are engineered, developed and tested to exceed your expectations for fit and function. Please refer to our catalog for the Chevrolet Performance Parts Authorized Center nearest you [or visit our website at](or visit our website at www.chevroletperformance.com)[ ](or visit our website at www.chevroletperformance.com)[www.chevroletperformance.com](or visit our website at www.chevroletperformance.com).
This publication provides general information on components and procedures which may be useful when installing or servicing a ZZ383 engine. Please read this entire publication before starting work. Also, please verify that all of the components listed in the package contents section below were shipped in the kit.
The information below is divided into the following sections: package contents, component information, ZZ383 engine specifications, additional parts that you may need to purchase, torque specifications, and a service parts list.
The ZZ383 engine incorporates modern technology in a package that can be installed in applications where 265-400ci small block Chevrolet V-8’s were originally used. This complete engine is assembled using brand new, premium quality components. Due to the wide variety of vehicles in which a ZZ383 engine can be installed, some procedures and recommendations may not apply to specific applications.
The ZZ383 engine consists of a cast iron engine block, cast aluminum “Fast Burn” cylinder head assemblies, forged steel crankshaft, hypereutectic pistons, powder metal connecting rods, performance camshaft, and hydraulic roller lifters.
The ZZ383 engine is manufactured on current production tooling; consequently you may encounter dissimilarities between the ZZ383 engine assembly and previous versions of the small block V-8. In general, items such as motor mounts, accessory drives, exhaust manifolds, etc. can be transferred to a ZZ383 when it is installed in a vehicle originally equipped with a small block V-8 engine. However, as noted in the following sections, there may be minor differences between a ZZ383 engine and an older small block V-8 engine. These differences may require modifications or additional components not included with the ZZ383 engine. When installing a ZZ383 engine in a vehicle not originally equipped with a small block V-8, it may be necessary to adapt or fabricate various components for the cooling, fuel, electrical, and exhaust systems.
It is not the intent of these specifications to replace the comprehensive and detailed service practices explained in the GM service manuals.
For information about warranty coverage, please contact your local Chevrolet Performance Parts dealer.
Observe all safety precautions and warnings in the service manuals when installing a ZZ383 engine in any vehicle. Wear eye protection and appropriate protective clothing. When working under or around the vehicle support it securely with jackstands. Use only the proper tools. Exercise extreme caution when working with flammable, corrosive, and hazardous liquids and materials. Some procedures require special equipment and skills. If you do not have the appropriate training, expertise, and tools to perform any part of this conversion safely, this work should be done by a professional. | | | | TITLE ZZ383 Performance Crate Engine REV 05JN14 | PART NO. 88962517 | SHEET 1 OF 30 | | | | | | --- | --- | --- | | The information contained in this publication is presented without any

FAQs

What is this ZZ383 publication intended to provide?

It provides supplemental information about the ZZ383 engine and related components, including installation procedures and useful modifications, and it is designed to be used alongside GM service manuals and parts catalogs.

Why might some installation recommendations not apply to every vehicle?

Because ZZ383 engines can be installed in a wide variety of applications, some procedures and recommendations may not match specific vehicle setups, potentially requiring minor modifications or additional components.

What safety and liability cautions does the manual include?

Users must observe safety precautions from service manuals, use proper tools and protective equipment, and accept that risk for use is assumed by the user. It also includes legal and emissions restrictions, especially for federally required emission control systems.

Oct 29, 2026

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