If you’ve spent any time under the hood of a Holden Commodore, chances are you’ve come across an LS engine. These Chevrolet-derived V8s have dominated Australian roads and tracks, from the VT Series II to the VF Commodore, as well as HSV models like the Clubsport, Maloo, and GTS.
Why? Because LS engines are bulletproof, easy to modify, and capable of making serious power without breaking the bank. Whether you’re looking to swap an LS into a project car, build a high-horsepower street beast, or just understand what makes them tick—this guide has you covered.
1. How Much Horsepower Does an LS Engine Have?
Power output varies across different LS engines. Here’s a quick breakdown of the most common LS variants found in Australian Holdens:
| Engine | Stock HP (Factory) | Models Found In |
|---|---|---|
| LS1 (5.7L) | ~260–300 kW (349–402 HP) | VT II – VZ Commodore, Monaro, HSV GTS |
| LS2 (6.0L) | ~290–300 kW (389–402 HP) | VZ HSV Clubsport, WL Statesman, early VE Commodore |
| L76 / L77 (6.0L) | ~270–300 kW (362–402 HP) | VE Commodore (SS, SSV, Calais), Caprice, HSV models |
| LS3 (6.2L) | ~317–340 kW (425–455 HP) | VF Commodore SS, HSV GTS, Maloo, Clubsport |
| LSA (Supercharged 6.2L) | ~400 kW (536 HP) | HSV GTS, GTSR, W1 |
💡 Want more power? Upgrading the camshaft, adding an OTR intake, and getting an HP Tuners tune can push even a stock bottom-end LS past 400kW with ease.
Check out our HP Tuners range here.
2. Is a 6.0L an LS1 or LS2?
A 6.0L LS engine is typically an LS2, L76, or L77, not an LS1.
- LS1 (5.7L) was used from 1999–2005 in Holdens before being replaced.
- LS2 (6.0L) came in HSV models like the VZ Clubsport and early VE Commodores.
- L76/L77 (6.0L) are variations found in VE Commodores, with the L77 having Active Fuel Management (AFM).
🔧 If you’re upgrading a VE Commodore, a DOD Delete Kit is essential for removing AFM cylinder deactivation:
👉 Check out the L76/L77 DOD Delete Kit here.
3. What Is the Best LS Engine for a Swap?
The best LS for a swap depends on budget, power goals, and compatibility.
- Budget Build: LS1 – Cheap and widely available from wrecked VT-VZ Commodores.
- Best for Power: LS3 – Found in VF SS Commodores, makes 425+ HP stock, excellent for forced induction.
- Ultimate Choice: LSA – Factory supercharged, comes in HSV GTS/GTSR, easy to push 700+ HP with mods.
💡 Pro Tip: LS swaps need a wiring harness, fuel system upgrades, and engine mounts.
🔗 Find all the LS swap parts you need here.
4. LS1 vs. LS2: Which Is Better?
🔧 LS1 Pros:
✅ Cheaper, more available in wreckers
✅ Proven reliability in VT-VZ Commodores
✅ Strong aftermarket support
🔥 LS2 Pros:
✅ More power stock (~20-30HP more than LS1)
✅ Better heads & stronger internals
✅ Easier to tune and modify for bigger power gains
💡 Verdict: If budget is a concern, go LS1. If you want an easier high-power build, go LS2.
Upgrade your LS camshaft package here.
5. What’s the Cheapest LS Engine to Build?
If you’re on a budget, the LS1 or L98 (VE Commodore SS engine) are the most cost-effective options.
- LS1 (5.7L): Easy to find, responds well to cams & bolt-ons.
- L98 (6.0L): Stronger bottom end than LS1, no AFM to disable like L76/L77.
🔧 Cheapest Upgrade Path:
1️⃣ OTR Intake – VCM OTR Kits
2️⃣ Camshaft Upgrade – VCM Cam Packages
3️⃣ Tune with HP Tuners – MPVI3 Tuning Tool
6. What Are the Downsides of LS Engines?
While LS engines are fantastic, they aren’t perfect. Here are the biggest downsides:
🚨 Oil Issues – Stock oil pumps are known to fail, leading to low oil pressure.
🔧 Weak Rod Bolts – High-RPM use can cause rod bolts to stretch, leading to failure.
🔥 Tuning Sensitivity – LS engines need a proper tune after any mods to avoid detonation.
💡 Fix It: A high-flow oil pump and upgraded rod bolts are a must for performance builds.
Check out oil system upgrades here.
7. What’s Required for an LS Swap?
An LS swap isn’t just about the engine. Here’s a basic checklist:
✅ Engine Mounts & Crossmember Adapters
✅ Wiring Harness & ECU (Standalone or Custom Tune)
✅ Fuel System (High-Pressure Pump, Injectors)
✅ Cooling System (Radiator & Fans)
✅ Headers & Exhaust Mods
✅ Tuning (HP Tuners for ECU Remapping)
🔗 Find all the LS swap essentials here.
8. Which LS Engine Is the Strongest?
🦾 Stock for Stock: The LSA (6.2L Supercharged) is the toughest, with forged internals from factory.
🏆 Built Motor: The LSX (7.0L Iron Block) is the king, handling 1,000+ HP with ease.
Want LSA Power? Check out the VCM LSA Upgrade Kit:
🔗 LSA Performance Parts
The LS Engine Is an Aussie Icon
From the streets to the strip, LS engines power some of Australia’s most legendary Holdens. Whether you’re doing a simple cam swap, a full rebuild, or an LS swap into something unexpected, the LS is the best bang-for-buck V8 you can get.