LS CHEVY LS 5.3L 510HP 6.2L COMPLETE CRATE ENGINE PROBUILT LS2 LS6 Ls3 ls2 LSX L

LS Chevy 5.3L and 6.2L 510HP Complete Crate Engine | Pro-Built

If your build needs serious naturally aspirated power in a complete, ready-to-run package, this is the engine. This LS Chevy complete crate engine is professionally built to produce 510 horsepower. It is not a stock used engine, and it is not a mild street build. Instead, it is a fully assembled high-output LS V8 built on proven platform combinations including LS2, LS6, LS3, and LSX.

At 53LSEngine.com, we carry pro-built complete crate engines for buyers who want documented high output without assembling the engine themselves. Because every build ships with a full specification sheet, you know exactly what is inside before it arrives.

What Makes This a Pro-Built Complete Crate Engine

A pro-built complete crate engine comes fully assembled from experienced LS engine builders to a specific output target. The block, cylinder heads, camshaft, rotating assembly, and induction system all work together as a matched package. As a result, you are not buying a core and hoping the parts combination works out. You are buying a finished engine with a known specification.

This listing covers both 5.3L and 6.2L displacement options depending on the block platform you choose. The 510 horsepower figure reflects the output target for the current build combinations. However, actual output depends on the specific block, head, camshaft, and induction package. Contact us to confirm the exact figure before ordering.

Who This Engine Is For

This build suits buyers who need high naturally aspirated LS output in a complete package.

Serious swap builders who want a known high-output specification from the start. If your build targets 500-plus horsepower naturally aspirated, this gets you there in one purchase. You skip multiple rounds of parts sourcing and machine work.

Restomod and custom shops that need a documented high-output engine for a client build with a confident output claim.

Track and performance owners who want a complete engine ready to install rather than managing an engine build alongside the rest of the project.

Buyers stepping up from a Stage 3 build who need more displacement, a more aggressive specification, or a specific block platform.

Platform and Block Options

This listing covers a range of proven LS platform combinations in both 5.3L and 6.2L displacement. Contact us to confirm which combination sits in the current available unit.

LS2

The LS2 is a Gen 4 aluminum block 6.0L engine. It powered the 2005 through 2007 Corvette, the 2006 Pontiac GTO, and the Trailblazer SS. The aluminum block keeps weight down while giving a larger displacement foundation than the 5.3L family. In addition, it responds well to head and camshaft upgrades.

LS6

The LS6 is a Gen 3 aluminum block 5.7L engine from the 2001 through 2004 Corvette Z06. It carries an aggressive factory camshaft and high-flow cylinder heads. As a build foundation, it therefore brings strong performance heritage and excellent head and valvetrain starting points.

LS3

The LS3 is a Gen 4 aluminum block 6.2L engine with rectangular port cylinder heads. Those heads flow significantly more air than cathedral port alternatives. It powered the 2008 through 2013 Corvette and the 2010 through 2015 Camaro SS. For a naturally aspirated build targeting 510 horsepower, the LS3’s airflow ceiling gives you real headroom.

LSX

The LSX is an aftermarket cast iron block from GM Performance Parts. GM built it specifically for high-performance LS engine builds, and it is stronger than any production LS block. For a naturally aspirated build at this output level, the LSX therefore provides significant strength margin. That margin translates directly into long-term durability.

Specifications

Exact specifications depend on the build combination. The table below shows the general range for this listing.

Because specifications vary by build, contact us at +1 (216) 230-5433 or Sales@53lsengine.com for the exact details on the current unit.

5.3L vs 6.2L: Which Displacement Fits Your Build

Both displacement options reach the 510 horsepower target, but they get there differently.

The 5.3L combination relies more heavily on head flow, camshaft specification, and RPM to reach the output figure. It produces its power higher in the rev range. For a lighter chassis or a build that spends time at higher RPM, this suits the application well.

The 6.2L combination reaches the same output with more displacement working for it. Consequently, it makes more torque at lower RPM and feels stronger in normal street driving. For heavier chassis builds or applications where low-end pull matters, the 6.2L is the better fit.

Contact us to discuss which combination suits your specific chassis and intended use before ordering.

What Is Included

This engine ships as a complete assembled unit. Contact us to confirm the exact component list before ordering.

Typically Included

• Complete assembled long block with performance rotating assembly
• Performance cylinder heads, fully assembled
• Performance intake manifold
• Fuel rails and injectors sized for the build
• Valve covers
• Oil pan
• Timing cover
• Harmonic balancer
• Full build specification sheet

Available on Select Builds or Upon Request

• Engine wiring harness
• ECU and controller
• Throttle body and sensors
• Accessory drive components
• Coil packs and ignition components

Not Included Unless Confirmed

• Transmission
• Flywheel or flexplate
• Engine mounts
• Exhaust manifolds or headers
• Chassis-specific accessories

Always confirm the complete component list with us before ordering. A complete crate engine and a bare long block are different purchases at different price points.

Supporting Systems You Will Need

A high-output LS engine requires compatible supporting systems. Plan these before the engine arrives.

ECU and Tune

A performance camshaft and modified induction require an ECU calibration matched to the build. A stock factory tune does not manage the fuel and ignition needs of a 510 horsepower LS correctly. As a result, budget for a professional tune from a shop experienced with high-output LS applications.

Fuel System

This engine uses injectors sized for the build’s fuel demand. Therefore, your fuel pump, lines, and regulator need to handle that flow. Confirm your fuel system capacity before the engine arrives.

Exhaust

A 510 horsepower LS flows significantly more air than a stock engine. Because of that, restrictive exhaust limits what the engine can actually do. You need performance headers matched to the cylinder head port style and a free-flowing exhaust system.

Note that the LS3 uses rectangular port cylinder heads. Cathedral port headers will not fit correctly. Confirm your header selection matches the head configuration in your specific build.

Cooling System

More power means more heat. Confirm your cooling system can handle it. A radiator that worked fine with a stock engine may not hold up under sustained hard use with a 510 horsepower build.

Build Documentation

Every pro-built crate engine ships with a full build specification sheet. That sheet confirms exactly what sits inside the engine before it goes into your project.

• Block specification — Block family, bore size, and deck condition documented
• Rotating assembly — Rod and piston specification, bearing clearances documented
• Compression ratio — Confirmed based on head, piston, and gasket combination
• Camshaft specification — Lift, duration, and LSA documented
• Cylinder head specification — Casting, port work, and valve job documented
• Valve spring pressure — Confirmed at spec for the camshaft before assembly

Pricing and Availability

Pricing depends on the block platform, displacement, build specification, and included components. Contact us at +1 (216) 230-5433 or Sales@53lsengine.com for current pricing, build specification, output figures, and availability.

Also review our refund and return policy before purchasing so you understand the full terms.

Shipping

Every engine ships on a certified freight pallet with all ports plugged and the assembly secured for transit. You receive a tracking number when it ships. Before signing the delivery receipt, inspect the pallet and packaging carefully. If you see visible shipping damage, note it with the carrier immediately.

For residential deliveries, confirm liftgate service with the freight carrier when scheduling.

Other Engine Options

Not sure this build fits your project? Browse our other options instead.

• Gen 3 Vortec 5.3 LS LM7 — stock used engine for 1999 to 2007 replacements and mild swaps
• Gen 4 Vortec 5.3 LS LH6 — stock used engine for 2007 to 2013 applications with VVT
• Gen 5 EcoTec3 5.3 LS L83 and L86 — stock used engine for 2014 and newer applications
• 5.3 LS Stage 3 Performance Build — built 5.3 LS for performance street and swap builds
• 525 HP Chevrolet Performance LS3 Crate Engine — factory GM Performance unit with GM warranty
• 510 to 560 HP Pro Built Complete Crate Engine — includes LQ and Dart block options
• Browse all used 5.3 LS engines
• Browse junkyard 5.3 LS engines
• Browse all build 5.3 LS engines

Frequently Asked Questions

Platform and Output Questions

What platforms are available for this crate engine?
This listing covers LS2 aluminum, LS6 aluminum, LS3 aluminum, and LSX iron block options in both 5.3L and 6.2L displacement. Contact us to confirm which combination sits in the current unit and what else you can order.

How much horsepower does this engine make?
The build targets 510 horsepower. However, exact output depends on the block, head, camshaft, and induction combination in the current unit. Contact us at +1 (216) 230-5433 for the confirmed figure.

Should I choose the 5.3L or the 6.2L?
The 6.2L makes more torque at lower RPM because of the extra displacement. The 5.3L reaches the same peak output higher in the rev range. For heavier chassis or street driving, the 6.2L usually fits better. Contact us to discuss your specific build.

Installation and Setup Questions

Is this engine street driveable?
Yes, with the correct supporting systems. You need a matched ECU calibration, a compatible fuel system, and performance exhaust. This is not a mild street build, but it is not a race-only engine either.

Do I need a tune?
Yes. A performance camshaft and modified induction require an ECU calibration matched to the specific build. Therefore, budget for a professional tune from an experienced LS shop as part of your total cost.

Do the LS3 heads need special headers?
Yes. The LS3 uses rectangular port cylinder heads, so cathedral port headers will not fit correctly. Confirm your header selection matches the head configuration in your build before ordering.

Ordering and Shipping Questions

What comes with the engine?
A full build specification sheet ships with every engine. In addition, contact us for the current component list, camshaft specification, compression ratio, block combination, and output figures before ordering.

Can I get this shipped to my location?
Yes. We ship to all 50 states via freight carrier on a secured pallet. Contact us with your delivery ZIP code and we then confirm the shipping cost before you order.

What warranty comes with this engine?
Warranty terms vary by build. Contact us at +1 (216) 230-5433 or Sales@53lsengine.com to confirm coverage before purchasing. Also review our refund and return policy.

Ready to Order

If you are ready for a professionally built 510 horsepower complete LS crate engine with a documented specification, contact us before you order. We then confirm the build combination, displacement, output figures, included components, pricing, and shipping cost for your location before you commit.

Call us: +1 (216) 230-5433
Email us: Sales@53lsengine.com

Visit our About page to learn more about how we operate. Also review our refund policy and Privacy Policy before placing your order.