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🔥 Factory GM · Part #19432629 · In Stock
LS3 Engine for Sale
Chevrolet Performance 525 HP Crate
The most powerful naturally aspirated 6.2L street engine in the Chevrolet Performance lineup — built on the legendary LS3 foundation with a race-proven ASA camshaft. Ready to drop in.
525 HP
@ 6,300 RPM
489 lb-ft
Torque @ 4,400 RPM
6.2L
376 CID Displacement
Factory
GM Engineered
If you've been searching for an LS3 engine for sale that's actually worth buying — not a junkyard pull with 80,000 mystery miles, not a backyard rebuild — you've found it. The Chevrolet Performance LS376/525 is the real thing: a factory-engineered, race-cam equipped, 6.2L powerplant built by the same team that put LS engines in Corvettes and Camaros for decades.
At OMJ Auto Solutions, we carry the Chevrolet Performance LS3 525 HP Long Block Crate Engine (Part #19432629) — the most powerful naturally aspirated 6.2L crate engine in GM's street performance lineup. It pairs the proven LS3 bottom end with the ASA racing camshaft, a component developed for the high-RPM demands of circle-track racing. The result is 525 horsepower and 489 lb-ft of torque that revs hard, pulls strong, and carries the GM factory warranty.
Whether you're swapping into a classic Camaro, building a pro-touring machine, replacing a worn engine in a C6 Corvette, or dropping raw power into a custom build — this is the crate engine the enthusiast community has trusted for over a decade.
Complete Specifications
LS3 525 HP Crate Engine — Full Specs
Every number below comes directly from Chevrolet Performance. Part number 19432629 — the LS376/525 long block — is factory-assembled, internally balanced, and dyno-verified before it leaves the GM facility.
| Specification | Detail |
|---|---|
| GM Part Number | 19432629 (LS376/525) |
| Engine Family | Gen IV LS Small-Block V8 |
| Displacement | 6.2L / 376 CID |
| Horsepower | 525 HP @ 6,300 RPM |
| Torque | 489 lb-ft @ 4,400 RPM |
| Bore × Stroke | 4.065" × 3.622" (103.25 × 92mm) |
| Compression Ratio | 10.7:1 |
| Recommended Fuel | 92 Octane Premium |
| Max RPM | 6,600 RPM |
| Block | Cast Aluminum — 6-bolt, cross-bolted main caps |
| Cylinder Heads | Aluminum L92-style port — 68cc chambers |
| Valve Size | 2.165" intake / 1.590" exhaust |
| Camshaft | ASA Racing Hydraulic Roller |
| Cam Lift | 0.525" intake / 0.525" exhaust |
| Cam Duration @ 0.050" | 226° intake / 236° exhaust |
| Lobe Separation Angle | 110° |
| Rocker Arm Ratio | 1.7:1 — Investment-cast roller trunnion |
| Crankshaft | Nodular Iron |
| Connecting Rods | Powdered Metal Steel |
| Pistons | Hypereutectic Aluminum |
| Reluctor Wheel | 58x (late-model GM compatible) |
| Engine Balance | Internal |
| Rear Main Seal | 1-piece |
| Included | Intake manifold, fuel rail, injectors, throttle body, water pump, ignition, valve covers, timing cover, harmonic balancer, oil pan |
| Not Included | Exhaust manifolds, flexplate, front accessories, engine controller (sold separately: PN 19354332) |
| Warranty | 24 months / 50,000 miles (installed by qualified shop) |
| Shipping | Free — Continental United States |
Why This Engine
6 Reasons the LS3 525 HP
6 Reasons the LS3 525 HP
Is the Right Buy
01
🏁
Race-Proven ASA Camshaft
The ASA cam was developed for circle-track racing — aggressive hydraulic roller with 0.525" lift and a tight 110° lobe separation angle that delivers razor-sharp throttle response and exceptional high-RPM breathing. You'll feel it the moment the engine comes alive.
02
🏭
Factory GM Engineering
This isn't a third-party rebuild. It's a genuine Chevrolet Performance product — the same engineering team behind Corvette, Camaro, and the entire LS platform. Every tolerance, every component, every spec meets GM's own standards.
03
⚡
525 HP Naturally Aspirated
No turbos. No supercharger. No nitrous. The LS376/525 makes its power the old-fashioned way — displacement, airflow, and a cam that means business. At 525 HP, it's the most powerful naturally aspirated 6.2L street engine in the Chevrolet Performance lineup.
04
🔩
Aluminum Block & Heads — Lightweight
The all-aluminum construction keeps weight down while managing heat efficiently. The L92-style cylinder heads with 68cc chambers and large 2.165" intake valves flow aggressively — giving the ASA cam the airflow it needs to make power at high RPM.
05
🔌
More Complete Than a Long Block
This "long block" ships with intake manifold, fuel injectors, fuel rail, throttle body, water pump, ignition system, valve covers, timing cover, harmonic balancer, and oil pan already installed. Less work for you. More time building your project.
06
🛡️
24-Month / 50,000-Mile Warranty
When installed by a qualified independent service center, this engine carries Chevrolet Performance's full 24-month or 50,000-mile warranty. That's factory confidence — backed by a company that's been building performance engines since 1911.
Who It's Built For
Perfect For These Builds
The LS3 525 HP crate engine is the answer for builders who need real horsepower, factory reliability, and broad swap compatibility — all in a single purchase.
🏎️ Classic Muscle Car Restomods
Chevelle, Nova, first-gen Camaro, El Camino — drop modern power into a classic chassis. The LS3 swaps into virtually every GM classic with the right mounts.
🐍 C5 / C6 Corvette Upgrades
Replace a worn LS1 or LS2 with a factory 525 HP LS3. More power, same form factor, and full GM engineering behind it.
🔥 5th Gen Camaro SS Builds
The LS3 is the direct production engine for the 2010–2015 Camaro SS. A fresh crate unit is the cleanest replacement or upgrade available.
🛻 LS Swap Trucks & SUVs
Silverado, Tahoe, Suburban — the LS3 slots into any Gen IV LS swap with the right accessories and controller kit.
🏁 Pro-Touring & Track Builds
525 naturally aspirated horses with factory reliability. The ideal powerplant for autocross, track days, and road-course builds that need dependability above all.
🔧 Engine Replacement Builds
Worn-out engine in any LS-equipped vehicle? A factory crate unit is cleaner, more reliable, and often more affordable than a full rebuild.
Not sure if the LS3 525 is right for your build? Our team helps you confirm fitment, controller requirements, and accessory needs before you order. Contact us here — we'll get you sorted fast.
Honest Comparison
LS3 525 HP Crate vs.
LS3 525 HP Crate vs.
Used or Rebuilt LS3
There's no shortage of "LS3 engines for sale" online — but most of them aren't what they claim to be. Here's how the factory Chevrolet Performance crate stacks up against the alternatives.
| Feature | Chevy Performance Crate #19432629 | Used / Pulled LS3 |
|---|---|---|
| Origin | ✔ Factory GM — New Build | ✗ Unknown Mileage & History |
| Horsepower (Verified) | ✔ 525 HP — Factory Dyno | ✗ Unknown — Often Degraded |
| ASA Racing Camshaft | ✔ Installed — Spec Correct | ✗ Stock Cam Only |
| Internals | ✔ New — All GM Spec Parts | ✗ Worn — Unknown Condition |
| Intake / Fuel System | ✔ Included & Installed | ✗ Usually Stripped |
| Throttle Body | ✔ Included | ✗ Rarely Included |
| Water Pump | ✔ Included | ✗ Not Included |
| Warranty | ✔ 24 Mo / 50,000 Miles | ✗ 30–90 Days at Best |
| Risk of Early Failure | ✔ Minimal — Factory Quality | ✗ High — No Oversight |
| Free Shipping | ✔ Yes | ✗ You Pay Freight |
Customer Reviews
Builders Who Already Bought It
★★★★★
"Dropped this into my '69 Camaro restomod. First start was perfect — that ASA cam gives it a real lopey idle that sounds absolutely incredible. 525 HP in a classic body. Couldn't be happier."Travis H. — 1969 Camaro Build
★★★★★
"Was going to rebuild my worn LS2, but after pricing it out I went with the LS3 525 HP crate instead. More power, full warranty, and it shipped faster than expected. Best decision I made on this build."Derek M. — C5 Corvette Owner
★★★★★
"Legitimate Chevrolet Performance part, great price at OMJ, fast shipping. Installed in my pro-touring Chevelle and it runs absolutely flawlessly. The high-rpm pull of this thing is insane."Brian K. — Chevelle Pro-Touring Build
Common Questions
Frequently Asked Questions
How much horsepower does the LS3 525 HP crate engine make?
The Chevrolet Performance LS376/525 (part #19432629) produces 525 horsepower at 6,300 RPM and 489 lb-ft of torque at 4,400 RPM. These are factory-verified numbers from Chevrolet Performance's own dyno testing — not estimations.
What makes this different from the standard LS3 430 HP engine?
The key difference is the ASA racing camshaft. The standard LS3 produces 430 HP with a stock cam. The LS376/525 installs the aggressive ASA hydraulic roller cam — 0.525" lift, 226°/236° duration, 110° LSA — which expands the power band at high RPM and delivers 95 additional horsepower over stock, all without changing the displacement or compression ratio.
What vehicles is this LS3 crate engine compatible with?
The LS3 525 HP is compatible with any vehicle using a Gen IV LS engine — including Chevy Camaro (2010–2015), C6 Corvette, classic restomod builds (Camaro, Chevelle, Nova, El Camino), and any custom LS swap application. For older vehicles without electronic throttle control, you'll also need the controller kit PN 19354332.
What's included with this long block crate engine?
Despite being called a "long block," this engine ships very complete: intake manifold, fuel injectors, fuel rail, throttle body, water pump, ignition system, valve covers, timing cover, harmonic balancer, and oil pan are all included and assembled. You'll need to source exhaust manifolds, flexplate, front accessory drive, and the engine controller separately.
Does the LS3 525 HP require premium fuel?
Yes — 92 octane premium fuel is recommended to protect the 10.7:1 compression ratio and allow the engine to achieve its full 525 HP output. Running lower-octane fuel risks detonation and will reduce power output.
What is the warranty on this crate engine?
Chevrolet Performance warrants this engine for 24 months or 50,000 miles — whichever comes first — when installed by a qualified independent service center. This is a full GM factory warranty, not a limited third-party coverage policy.
The Most Powerful Naturally
Aspirated 6.2L Street Engine
525 HP. Factory GM. Race-proven cam. 24-month warranty. Free shipping. This is the crate engine your build has been waiting for.
🔥 Buy the LS3 525 HP Crate Engine Now ✅ Free Shipping · 🏭 Genuine Chevrolet Performance · 🔒 Secure Checkout · 🛡️ 24-Month Warranty
LS3 Engine for Sale
Chevrolet Performance 525 HP — #19432629
Buy Now 🔥