Looking to swap the venerable LS engine into your hot rod, muscle car, or classic truck? Take a look at our detailed identification guide for Gen III/IV LS engines before you hit the salvage yard or swap meet!

Gen III/IV LS Engine ID Guide

Learn how to identfy motors for your LS Swap. In this guide we cover generation 4 small block engines and some of the cheaper options for more power.

Gen 4 LS Engines - Junkyard LS Swap Identification Guide: Part 2

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.

How to Identify GM Transmissions | 700R4, TH350, 4L60, TH400, 4L80e, Powerglide, & More

Chevy LS engines get Engine Code as Top Category

Engine Family Facets

707063f6-5cf0-44d1-8e1f-49059e48addf

3fe4cfeb-d42e-4b60-a312-2940d324f962

Ford Thunderbird Ignition Coil Covers Gm Chevy Gen 4 V8 Ls 4 8 L20

Ford Thunderbird Electronic Ignition Systems Gm Chevy Gen 4 V8 Ls 4 8 L20

Ford Thunderbird Rev Limiters Gm Chevy Gen 4 V8 Ls 4 8 L20

Ford Thunderbird Ignition Coils Gm Chevy Gen 4 V8 Ls 4 8 L20

Popular Parts

Ford Thunderbird GM L20 Knock Sensor

Ford Thunderbird GM L20 Knock Sensor | Speedway Motors

Shop Ford Thunderbird GM L20 Knock Sensor and get Free Shipping on orders over $175 at Speedway Motors.

Ford Thunderbird GM L20 Knock Sensor

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ICT Billet 551216-KN40 LS Gen 4 Knock Sensor Relocation Brackets

Chevrolet Performance Parts 12589867 LS Replacement Knock Sensor

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