LS Swap Guide: Everything You Need for a Clean V8 Install

Why LS Swap?

The GM LS family of V8 engines is the most popular engine swap platform in America — and for good reason. LS engines are compact, lightweight, extremely powerful, and abundant in junkyards and on the used market. A junkyard 5.3L LS will make 300 whp in stock form for under $500, and with bolt-on mods can push well past 400 whp. The aftermarket support is unmatched by any other V8 platform.

Choosing Your LS Engine

LS1 (4.8L / 5.7L)

The original LS platform. Found in C5 Corvettes, early Camaros, and F-body cars. Great starting point for stock builds. Smaller bore limits performance ceiling vs later LS variants.

LS2 (6.0L)

Significant upgrade over LS1. Higher compression, better heads, stronger internals. Found in C6 Corvettes and SSR trucks. Excellent swap engine for street builds targeting 450–500 whp.

LS3 (6.2L)

The best naturally aspirated swap engine in the LS family. Cathedral port rectangle port heads flow very well. Found in late model Camaros and C6 Corvettes. Makes 430+ whp stock and responds very well to cam, headers, and tune.

LS7 (7.0L)

Dry sump racing engine from the C6 Z06. Titanium connecting rods, titanium valves, flat-tappet cam. Makes 500+ whp in stock form. The ultimate naturally aspirated LS swap for serious builds.

Key Swap Components

• Engine mounts: Application-specific from ICT Billet, Dirty Dingo, or Speedmaster
• Transmission: T56 Magnum 6-speed or Tremec T56 are the most popular manual options. 4L60E and 4L80E for automatic builds.
• Wiring harness: Most critical component. Get a quality standalone harness from Speartech, Painless Performance, or similar. Budget $800–$1,500.
• Headers: Application-specific LS swap headers. Most common: Hooker Blackheart, Hedman swap headers
• Cooling: Aluminum radiator with electric fan setup is standard. Derale and SPAL fans are popular choices.

Budget Breakdown

• Junkyard 5.3L LS engine: $400–$800
• Engine mounts: $150–$300
• Wiring harness: $800–$1,500
• Transmission: $800–$2,500
• Headers + exhaust: $500–$1,200
• Miscellaneous hardware: $500–$1,000
• Total basic LS swap: $3,000–$7,000

Tune — Do Not Skip This Step

Every LS swap requires a proper tune once installed. HP Tuners or EFILive are the standard tools. Budget $300–$500 for a custom dyno tune. This is where you will actually see all the power the engine is capable of.

Final Verdict

The LS3 from a late model Camaro or C6 Corvette is the best all-around swap engine for most builds. It makes serious power stock, parts are everywhere, and the aftermarket is massive. Whether you are swapping a classic truck, a first-gen Camaro, or a fox body project car, the LS will deliver reliable, tuneable V8 power.