SKU: 69729694023

Chevrolet Performance LS 376/525 LS3 Long Block Crate Engine # 19435110

Sale price$6637.50 Regular price$7375.00
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Description

Chevrolet Performance LS 376/525 LS3 Long Block Crate Engine # 19435110Crate Engine, LS 376 525 LS3 Long Block, Internal Balance, Hydraulic Roller, OE Roller, Aluminum Block and Cylinder Heads, Chevrolet, 6. 2L LS, Each Crate Engine Family: Chevy LS Actual Engine Displacement: 6. 2L 376 Crate Engine Cylinder Head Material: Aluminum Engine Block Material: Aluminum Advertised Compression Ratio: 10. 7: 1 Assembled: Yes Engine Balance: Internal Cam Style: Hydraulic roller, OE roller Rear Main Seal Style: 1 piece Intake

Crate Engine, LS 376/525 LS3 Long Block, Internal Balance, Hydraulic Roller, OE Roller, Aluminum Block and Cylinder Heads, Chevrolet, 6.2L LS, Each

Crate Engine Family:

Chevy LS

Actual Engine Displacement:

6.2L/376

Crate Engine Cylinder Head Material:

Aluminum

Engine Block Material:

Aluminum

Advertised Compression Ratio:

10.7:1

Assembled:

Yes

Engine Balance:

Internal

Cam Style:

Hydraulic roller, OE roller

Rear Main Seal Style:

1-piece

Intake Manifold Included:

No

Cylinder Heads Included:

Yes

Carburetor Included:

No

Throttle Body Included:

No

Distributor Included:

No

Oil Pan Included:

Yes

Valve Covers Included:

Yes

Timing Cover Included:

Yes

Water Pump Included:

No

Harmonic Balancer Included:

Yes

Flexplate Included:

No

Flywheel Included:

No

Air Cleaner Included:

No

Spark Plugs Included:

No

Spark Plug Wires Included:

No

Computer Included:

No

Wiring Harness Included:

No

Supercharger Included:

No

Remanufactured:

No

Quantity:

Sold individually.

Chevrolet Performance LS 376/525 LS3 Long Block Crate Engines

Chevrolet Performance has released its latest factory-engineered LS high-performance engine: the 376/525 LS3 long block. It blends the racing-derived ASA camshaft with the LS3 6.2L production engine to create the most powerful production-based crate engine in Chevrolet Performance's portfolio, delivering 525 hp at 6,200 rpm and 486 lbs.-ft. torque at 5,200 rpm. (For installation in older vehicles, the engine controller kit part number 19354332 is calibrated specifically for this new engine.)

Using the LS3 production enginethe same used in Corvettes and Camarosas the foundation for the LS 376/525 helped keep the retail price lower; while the ASA camshaft is a proven, power-building component that's been successful in the high-RPM world of Circle Track racing. The ASA camshaft is a hydraulic roller with .525-inch lift on both the intake and exhaust sides, along with 226 degrees duration on the intake side and 236 degrees on the exhaust side. Coupled with a tight, 110-degree lobe separation angle, it helps the engine deliver excellent throttle response and breath exceptionally well at high RPM. The cam also gives the LS 376/525 the most aggressive personality among Chevrolet Performance's growing lineup of production-based high-performance crate engines, which also includes the LS 376/480 and the carbureted LS 376/515.

Front-end accessories must be obtained separately, along with the engine controller kit. Chevrolet Performance offers several accessory drive kits to suit a variety of applications; and some installations for older vehicles will require the oil pan changed.

Engine specifications:

* Power: 525 hp at 6,200 rpm, 486 lbs.-ft. of torque at 5,200 rpm
* Displacement: 376 C.I.D., 6.2L
* Bore x Stroke: 4.060 in. x 3.620 in.
* Compression Ratio: 10.7:1
* Recommended Fuel: 92 Octane
* Block: Cast Aluminum with 6-bolt cross bolted main caps
* Crankshaft: Nodular Iron
* Connecting Rods: Powdered Metal Steel
* Pistons: Hypereutectic Aluminum
* Camshaft: Steel Hydraulic Roller Tappet
* Cam Lift: .525 in. Intake / .525 in. Exhaust
* Cam Duration at .050 in.: 226 deg. Intake / 236 deg. Exhaust
* Lobe Separation: 110 Degree
* Cylinder Heads: Aluminum L92 style ports
* Combustion Chamber: 68cc
* Valves: 2.165 in. Intake/ 1.590 in. Exhaust
* Rocker Arms: Cast Roller Trunnion, 1.7:1 Ratio
* Balance: Internal
* Reluctor: 58X
* Maximum GM Recommended RPM: 6,600
* GM Recommended Torque Converter Stall 3000-3400

Engine Includes:
-- Fully GM assembled long block
-- Oil pump, pick-up and Camaro oil pan (12628771)
-- Corvette harmonic balancer
-- Front timing cover with cam sensor
-- Oil filter
-- Passenger side RH oil dipstick and tube (not included)
(Note: Does not include oil dipstick tube, oil dipstick, or steam crossover tube.)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 69729694023

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4.5 ★★★★★
Based on 22 reviews
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Product Reviews
G
Verified Purchase
Glenn R. Miller
Grantham, US
★★★★★ 5
Well-packaged, quality materials, easy to assemble, very comfortable, great customer service
Color: Black Full Mesh, Style: Executive
When I received this package, I was surprised at how small/compact it was--hard to believe a high-back office chair could fit in that box! As I unpacked it, I was impressed by two things: first, how incredibly well it was packaged with an obvious intent to protect the components; second, how solid, heavy-duty, and high-quality those components were. I got the box unpacked and read the instructions. They were simple and easy to understand, and included so many "here's a good tip" notes that it was obvious that a lot of thought and experience had gone into writing them. I found the chair simple to assemble and had it done in less than 15 minutes. The chair was very adjustable. I was able to get the height to exactly what I wanted with no trouble at all. I was also able to adjust the height of the lumbar support, and to adjust how far it extended. There are a lot of adjustments you can make, the instructions lay that out quite thoroughly, too. As a result, the chair was very comfortable and helped me sit with a healthy posture. I bought this chair because I had begun having an ache in my lower back, which I suspected was due to a chair I had been using for over 5 years. Within 3 days, the back pain was gone. I was also very impressed with the customer service. Their manual mentions in multiple places things you can try if you have any issues, and always ends with "call us". Their team reached out to me after a few days to make sure I got the chair assembled with no issues and that it was comfortable. This was all part of the all-around quality of this purchase. I'm very happy with this chair!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026
M
Verified Purchase
Marcos Castillo
Massapequa, US
★★★★★ 5
Comparable to Higher-End Chairs, Solid Build and Support Without the Premium Price
Color: Black Full Mesh, Style: Executive, Color: Black Full Mesh, Style: Executive
I’ve been using this chair for a bit now and it’s been a genuinely upgrade. The build quality stands out right away, it has real heft and doesn’t feel cheap or hollow. Everything fits together cleanly and once assembled it feels stable and planted. I’m over 6 ft and 200+ lbs and it handles that without any issue, no creaking or sense that it’s being pushed to its limits. There’s enough space in the seat and back that you don’t feel boxed in. I added an extra ergonomic cushion and it still feels roomy, which isn’t always the case with chairs in this category. The adjustability helps a lot here, especially the lumbar support. Being able to move it up and down and also forward and back makes it easy to actually get it where you need it, instead of just accepting a fixed position. The armrests are also easy to dial in, especially if you’re switching between typing, reading, or leaning back a bit. The tilt range is useful, and the tilt tension is stronger than I expected. Even at my size it takes a bit of effort to lean back, which I see as a positive since it feels controlled and supportive rather than loose or overly easy to recline. The mesh is another strong point. It came in perfect condition, no snags, no loose threads, no rough edges anywhere. There weren’t any bits of untrimmed plastic on the frame either, which says a lot about the quality control. The mesh itself is taut with a bit of bounce, so it doesn’t sag but still has some give, which makes long sitting sessions more comfortable. Assembly was straightforward and clearly thought through. The instructions are easy to follow, but what stood out were the built in redundancies that keep you from second guessing anything. There are multiple left and right indicators when installing the arms, a clear front facing marker for the gas lift, and the screws are labeled in the packaging so you’re not guessing which goes where. It’s one of the smoother assembly experiences I’ve had. I also reached out to activate my warranty and had a very positive experience. I spoke with Alice who was very knowledgeable, quick, warm, and they went out of their way to help me with whatever I needed. When I inquired about the extra screw holes under the chair, she let me know that this was for a foot rest which was still in the production phase and unprompted offered to have one shipped to me when they were ready! There is an excellent team behind the product. Overall: well built chair with good materials, thoughtful design choices, and good adjustability to make it work for different setups. It feels durable, comfortable over longer periods, and especially well suited if you need something that can handle a larger frame without sacrificing support.
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Reviewed in the United States on April 20, 2026
M
Verified Purchase
Michael Verbeke
Omaha, US
★★★★★ 5
Great product AND customer service!
Color: Black Full Mesh, Style: Executive
I'm having a hard time writing this review because I can't tell which one I like better: the product or the customer service! I work on a computer all day, so a comfortable office chair is critical for me. This chair is great - it's adjustable in every way I need it to be, especially the armrests. The breathable mesh is both durable and supportive, and is more comfortable to sit in than the "overstuffed" chair it replaced. Let me just say: no company provides better customer service than MOLENTS. Right after assembling my chair (which was very easy, btw), I registered for the 2 year warranty they offer. The NEXT DAY I received an email from Alice in their customer service department 1) to confirm my warranty, 2) to tell me about the free foam seat cover they were sending me, and 3) to make sure the chair was comfortable and easy to assemble. Very few companies take the effort to follow up with customers right after making a purchase like that. I'm extremely happy with this purchase. This chair is worth MORE than it's weight in gold, and I strongly recommend to anyone thinking about buying an office chair to buy it from MOLENTS - you won't regret it. Oh, and if Alice's supervisors are reading this: she absolutely deserves a promotion!
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Reviewed in the United States on March 13, 2026
C
Verified Purchase
Chaz
Battle Creek, US
★★★★★ 4
good chair for price
Color: Black Full Mesh, Style: Executive
I have had for about 2 months and seems to be holding up well, so far, and is comfortable for most part. Only complaint is the arms do not lower a lot, so cannot go under the desk.
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Reviewed in the United States on April 29, 2026
J
Verified Purchase
JFH
Bozeman, US
★★★★★ 5
High quality and incredible customer service
Color: Black Full Mesh, Style: Executive
This is an extremely well made chair at a very competitive price. The packaging, assembly instructions, as well as the way the hardware was packaged and labeled is probably the best I've seen. I'm particular about tools, and the included allen wrench was better than the normal "included tools" so much so that i actually used it rather than one of my own. The assembly was easy, and the chair itself looks and feels very high quality, and is very comfortable. Perhaps best of all was the level of customer service. I emailed on a weekend to activate the warranty and request the free cushion they offer. I got a personal response in less than a day and they offered upgraded wheels for free as well. This is a company worth doing business with.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026

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