Engine. LS3 - The legendary V8 from General MotorsIt became the benchmark for tuning and swaps because of its combination of power, reliability and potential for modification. Chevrolet Corvette C6, Camaro SS, Pontiac G8 GXP And even pickup trucks. Chevrolet Silverado SSToday, the engine is in demand not only for the restoration of classic American cars, but also for projects to replace regular engines on domestic cars (for example, for the first time in the world). GAZelle Next or UAZ Patriot).

But the purchase LS3 The market is full of offers, from new engines in boxes to mileage units, and prices can vary by 2-3 times with the same declared specifications. In this article, we will discuss where it is more profitable to buy an engine, how to distinguish the original from a fake, what documents are required for legal import into Russia, and give current prices for 2026, taking into account the dollar rate.

Engine. LS3 It debuted in 2008 as a line-up development. LSsubstitute LS2Its key difference is the aluminum cylinder block (as opposed to the cast iron one). LS2), which reduced the weight by 25 kg while maintaining strength. 430 hp upon 6600 rpm and 575 Nm. The torque, but the real potential is revealed after tuning.

Basic parameters:

  • 🔧 Volume: 6.2 l6162 cm)
  • 🔥 Compression ratio: 10.7:1 (requires) 98th gasoline)
  • 🛢️ Lubrication system: "wet crankcase" (as opposed to LS7 dry
  • ⚡ EBU: E38 or E67 (Depends on the year and model of the car)
  • 🔄 Resource: 300-400 thousand km with proper maintenance

A unique feature of the LS3 is the ability to boost up to 600-800 hp on a standard unit with minimal improvements (replacement of camshafts, intake, exhaust and firmware of the ECU). For example, compressor installation Magnuson TVS2300 Adds +200 hp without the risk of destroying the engine, making it an ideal choice for drag racing or street racing.

📊 What kind of project do you need LS3 for?
Swap for domestic car (UAZ, GAZ)
Restoration of the Classic American (Camaro, Corvette)
Tuning for drag racing
Other

New vs LS3 contract: what is more profitable in 2026?

The price of a new engine LS3 from official dealers GM start off 28 000–32 000$ In Russia, such offers are rare, mostly through intermediaries who order the engines for the client. Contract options are cheaper, but there are nuances:

Type of engine Price (2026) Pluses Cons
New (in the box) 28 000–35 000$ 24-36 months warranty, 100% original parts, clean history Long delivery time (3-6 months), high duties (up to 30%)
Contract (run) 12 000–18 000$ Price 2 times lower, fast delivery (1-2 months), often with attachments Risk of hidden defects, unknown real mileage, possible problems with customs clearance
Recovered (remanufactured) 18 000–24 000$ 12 months warranty, tests on stand, close to new condition The price is comparable to the new when buying in the United States, in Russia is rare

⚠️ Attention: When purchasing a contract LS3 be sure to demand Carfax or AutoCheck Motors over 150,000 km of mileage often have worn crankshaft liners or microcracks in the block that only show up after installation, and Florida and Texas are particularly risky because they have high percentages of engines after a hurricane or flood.

If the budget is tight, consider alternatives:

  • 🔹 LS2 Cheaper by 30%, but heavier and less powerful (400 hp).
  • 🔹 L99 - similar LS3but with the system AFM (Cylinders shutdown), which makes tuning more difficult.
  • 🔹 LT1/LT4 It is more modern, but requires improvement of the cooling system and electronics.

Where to buy LS3: Top 5 trusted suppliers in 2026

Engine market LS3 In Russia, it is represented by both local companies and foreign sellers, and we selected 5 reliable options based on feedback, prices and delivery conditions:

  1. Jegs Performance (USA)

    One of the largest suppliers of parts for American cars, offers new and contracted LS3 Delivery to Russia takes 4-6 weeks, payment through intermediaries is possible (for example, the delivery of goods to Russia is not possible). ShopTaskerThe average price of a contracted engine 14 000$.

  2. Texas Speed & Performance

    Specializes in engines LS/LTIt sells both stock and forced versions (up to 600+ hp), the difference is free consultation on the selection of attachments. 16 000$ for a contract engine with a mileage of up to 80 thousand km.

  3. AutoSvap (Russia, Moscow)

    Local dealer with own warehouse in the suburbs. LS3 "turnkey" with the registration of all documents for the traffic police. 2 500 000–3 000 000 ₽ Plus, there's the possibility of a test drive before you buy.

  4. eBay Motors

    A marketplace with hundreds of offers, but a high risk of running into scammers, we advise you to buy only from sellers with a rating of 98%+ and reviews no older than 3 months. 10 000$ (doubtful lots) before 20 000$ (guarantee motors)

  5. LS Engine Supply (Europe, Germany)

    European supplier with offices in Poland and Lithuania, with the advantage of fast delivery (2-3 weeks) and customs clearance, prices 10-15% higher than the US, but without hidden fees. 18 000–22 000€.

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Before buying, check with the seller whether it is included in the package. EBOU, wire-burn and sensorWithout them, the engine won't start, and it'll cost $3,000 to $5,000 to buy it separately.

How to check LS3 before buying: checklist for 7 points

Even trusted vendors have hidden defects in their engines, so use this checklist to avoid problems:

Visual inspection for corrosion and repair marks (especially in the area of the kneeshaft beds)

Checking compression in all cylinders (normal: 12-14 bar, spread not more than 1 bar)

Analysis of the oil for the content of metal shavings (use a magnetic probe)

Pressure test (pressure block at 0.7 MPa)

Verification of the operation of the gas distribution phase change system (VVT)

EBU diagnostics for errors (codes) P0300–P0308 indicate ignition failures)

Verification of the engine VIN code with documents (must coincide with the Service Tag on the block

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Pay special attention knee-shaftIn. LS3 Liners 2 and 4 often wear out due to high loads, and if the seller refuses to provide a video of the start of the engine or compressometry data, this is a reason to be wary.

What to do if the seller does not give a guarantee?

Without a guarantee, buying an LS3 is risky, but if the engine is very cheap, you can insure:

1. Order an independent examination (cost ~$500).

2. require defective acts from the previous owner.

3. Buy the engine through a buyer-protected platform (e.g. eBay with the Money Back Guarantee option).

4. Put 10-15% in the budget for possible repairs (replacement of liners, glands, chains of the hydraulic metal).

Documents and customs clearance LS3: step-by-step instructions for Russia

Import of the engine LS3 It is legally possible to enter Russia, but requires a number of documents.

  1. Receiving an invoice from the seller

    The document should contain:

    • 📄 Exact name of model (GM LS3 Engine, Part Number 19201945)
    • 💰 Cost (indicate real to avoid additional charges)
    • 📦 Weight and dimensions (for the calculation of delivery)

  • Contract with a customs broker

    Self-clearing is possible, but it's complicated. Brokers charge 5 to 10 percent of the cost of the engine. 50 000–100 000 ₽.

  • Payment of fees

    Duty is applicable for internal combustion engines 20% Value + VAT 20% + excise tax (if volume > 3 liters) Total tax burden will be 40–50% from the price of the engine.

  • Certification

    Legal installation on the car is required TC approval (OTT) It can be obtained in Us or through accredited laboratories, the cost of 150 000 ₽.

    • ⚠️ Attention: If you're buying LS3 for swaps on domestic cars (for example, UAZ HunterThe vehicle will not pass inspection, and in 2026 the traffic police has tightened the requirements for conversion, now need test reports of the engine on the stand.

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    The most budgetary method of customs clearance is to import the engine as a "repair part" (FEA code 8409.91.900). The fee will be ~15%, but you will need to provide documents on the car for which the engine is intended.

    Tuning LS3: top 5 modifications for maximum return

    Stock-based LS3 It's 430 hp, but it's much more powerful, and here are the 5 most effective improvements (in terms of price/power ratio):

    Modifications Power build-up Cost (2026) Complexity of installation
    Cold inlet (K&N or Vararam) +15-20 hp 50 000–80 000 ₽ ⭐ ( 1 hour, no firmware required)
    EXIT manifold 1 7/8" + straightening +30-40 hp 120 000–200 000 ₽ ⭐⭐ ( requires welding)
    Camshafts Cam Motion or Texas Speed +50-80 hp 250 000–400 000 ₽ ⭐⭐⭐ ( valve adjustments are required)
    compressor Magnuson TVS2300 (6 psi) +200-250 hp 800 000–1 200 000 ₽ ⭐⭐⭐⭐ ( Requires a reinforced fuel pump and intercooler
    turbocatite BorgWarner EFR (10 psi) +300-400 hp 1 500 000–2 000 000 ₽ ⭐⭐⭐⭐⭐ ( You need a full flashing ECU and reinforced block)

    For swaps on domestic cars (for example, niva or Volga) frequently used adapter boards It's a popular solution for gearbox attachment.

    • 🔧 adapter LSx-to-GAZ for GAZ-21) — 45 000 ₽.
    • 🔧 Set LS-to-UAZ (with hydraulic clutch) 70 000 ₽.

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    After installing the compressor or turbine, be sure to modify the cooling system: add an additional radiator and pump with increased performance. LS3 It is not designed for thermal loads over 500 hp.

    LS3 Problems and How to Avoid Them

    Despite the reliability, the LS3 There are some “children’s diseases” that you should know about in advance:

    1. Oil leak through the valve cover

      The problem is that the gaskets deform when they overheat. Holley and use the pads. Fel-Pro.

    2. Depreciation of the GRM chain

      On motors with mileage > 150 thousand km, the chain is stretched, which leads to an error. P0011Solution: replacement of chain, stars and tensioner (set 30 000 RUB).

    3. System problems VVT

      Phase sensors (camshaft position sensors) fail due to oil intrusion. Symptoms: floating speed, error P0014Solution: Cleaning sensors or replacing them AC Delco.

    4. Overheating under high loads

      LS3 Prone to overheating at temperatures above 105°C. Solution: installing a larger radiator (e.g., Griffin) and a thermostat at 160°F.

    ⚠️ Attention: If you're buying LS3 for swaps on all-wheel drive vehicles (for example, UAZ Patriot.), note that the standard 4L60E hydrotransformer It can not withstand a moment of more than 600 Nm. 4L80E or 6L80E (cost ~200,000 ).).

    FAQ: Answers to Frequent Questions About Buying LS3

    Can I install LS3 on the VAZ-2107?

    Technically yes, but it will require some serious improvements:

    • 🔧 Manufacture of an adapter board for fastening the gearbox.
    • 🔧 Replacement of the front suspension with an independent one (for example, from the Volvo S40).
    • 🔧 Modification of the brake system (stock brakes VAZ will not cope with the weight of the engine).
    • 🔧 Reflashing of the ECU for Russian fuel (octane number 92-95).

    Project budget from 1 500 000 ₽ (excluding the cost of the engine)

    What oil do I pour in LS3?

    Recommended oils:

    • 🛢️ Mobil 1 5W-30 (for temperate climates).
    • 🛢️ Amsoil Signature Series 5W-30 (for extreme loads).
    • 🛢️ Royal Purple 10W-30 (For motors with mileage > 200 thousand km).
    Important: Change the oil every time. 5,000 km (even if you use synthetics). LS3 It is critical to monitor the level of oil - its consumption up to 1 liter per 1,000 km is considered the norm.

    How much does the LS3 swap cost on UAZ Hunter?

    Breakdown of costs (2026):

    LS3 engine (contract)1 800 000–2 200 000 ₽
    Adapter board + clutch80 000–120 000 ₽
    PPP (4L60E or Tremec T56)200 000–350 000 ₽
    Electronics (ECUs, tourniquets, sensors)150 000–250 000 ₽
    Cooling system + exhaust100 000–180 000 ₽
    Customs clearance + certification300 000–500 000 ₽
    Totally.2 730 000–3 600 000 ₽

    Work time: 3-6 months (depending on the availability of spare parts).

    How to distinguish the original LS3 from a fake?

    Signs of the original engine:

    • 🔍 There's a marking on the block. LS3 and part number ()19201945 or 12623784).
    • 🔍 The cylinder head has casting. GM (not Chinese copies)
    • 🔍 It's engraved on the flywheel. VIN code (Must be in line with the documents).
    • 🔍 The original is included. Service Tag (Yellow tag with QR code).

    Fakes often give away the lack of a knock sensor (see below).knock sensor) and poor quality of aluminium casting (porous structure).

    Do I need to register the LS3 swap at the traffic police?

    Yes, I will. Technical Regulations of the Customs Union 018/2011Replacing the engine with a non-standard is considered change of design of the TCLegalization will require:

    1. Get an examination in Us Or an accredited laboratory.
    2. Get it. test-board and safety-conclusion.
    3. Changes to the PTS through the traffic police.

    Cost of the procedure: 100 000–200 000 ₽Without registration, you may be fined 5 000 ₽ (Article 12.5 of the Administrative Code) or remove the numbers.