$275 Shipping

ATK LS02 Chevy LS3 415CI Stroker Base Engine 620+HP

$275 Shipping

ATK LS02 Chevy LS3 415CI Stroker Base Engine 620+HP
ATK Engines

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#35020050

ATK LS02 Chevy LS3 415CI Stroker Base Engine 620+HP

  • Bore/Stroke: 4.000” x 3.750”
  • Displacement: 377CI
  • Crankshaft: Scat 4340 forged external balance rear of the crank/internal balance front of the crank
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$10,599.00

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Product Summary

Long Block Crate Engine Type, 10.3:1 Compression Ratio

  • Bore/Stroke: 4.000” x 3.750”
  • Displacement: 377CI
  • Crankshaft: Scat 4340 forged external balance rear of the crank/internal balance front of the crank
  • Rods: Scat 4340 forged H beam with ARP 8740 bolts
  • Pistons: 2618 Forged -16cc dished with 2 valve reliefs
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Key Specs

Crate Engine TypeLong Block
Compression Ratio10.3:1
Engine Displacement415 cu. in.
Camshaft TypeHydraulic Roller
Cylinder Head MaterialAluminum
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ATK Engines LS02 Details

This LS3/415CI Stroker with LS3 Aluminum heads is making 620HP+. Expect big mid to upper end power, will have a noticeable idle. For optimal Performance you will need headers, chassis dyno tune and 36lb injectors. Your engine may not necessarily come with all components listed, but they are listed as our recommendations of parts to run for optimal performance.

Engine Specifications:

  • HP: 620
  • TQ: 550
  • Block: New GM LS3 Aluminum
  • Bore/Stroke: 4.065 x 4.000
  • Displacement (cu.in): 415ci
  • Crankshaft: Manley 4340 forged internally balanced 58 tooth reluctor
  • Rods: Manley 4340 forged H beam with ARP 8740 bolts
  • Pistons: Manley 2618 forged 10.3:1 compression
  • Rings: Moly
  • Camshaft: Hyd. Roller
  • Cam Specs: 240/256@50 .625/.625 113LSA
  • Timing Chain: Billet single roller
  • Cylinder Heads: LS3 aluminum 68.4cc/260cc 2.16/1.59 stainless steel valves
  • Rocker Arms: OE 1.7 ratio with bushing upgrade

    Recommended Components:

  • Oil Pump: Melling STD Volume high pressure
  • Balancer: PowerBond #PB1480-SS SFI internally balanced
  • Intake Manifold: Edelbrock victor Jr. #28457
  • Carburetor: Quick Fuel 850cfm mechanical secondary’s #Q-850
  • Spark Plugs: Autolite #104
  • Spark Plug Wires: MSD #5574

    Engine Info:

  • Flexplate/Flywheel: Internally balanced
  • Water Pump: Per application
  • Oil: Conventional / Non Synthetic 10W40
  • Oil Filter: Wix or K and N
  • Timing Control: We recommend MSD #6014 with a baseline of: 10deg @ 0RPM, 20deg @ 500RPM, 26deg @ 1500RPM and 31deg @ 2500RPM-6500RPM.
  • Spark Plug Gap: .040”
  • Firing Order: 18726543
  • Octane: 91+
  • Stall Converter: 3000+
  • Exhaust: 1 ¾” Headers

    Notes: A PCV valve must be ran; please follow the valve cover instructions provided. You must also run an Air-Oil separator system such as the Moroso #85487 to capture the excess crankcase vapors LS engines are known for. If you are not running a MAP Sensor, the MAP timing option in the timing control box must be zeroed out all the way across. Failure to do so will allow the controller to add timing which can lead to detonation. You must also run some sort of a steam line kit that dumps to your water pump, radiator or radiator hose; we recommend a 4 corner setup like the Trick Flow #TFS-306SB601. This allows air pockets/hot spots to escape the heads and can also be used to purge out trapped air when filling the radiator for the first time.

    Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.

    • CARB Warning

    Follow EPA, CARB, and state regulations for engine changes

    Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine
    CA Prop 65
    CARB warning

    ATK Engines LS02 Specifications

    KEY SPECS
    MFG. Part #LS02
    BrandATK Engines
    Crate Engine TypeLong Block
    Compression Ratio10.3:1
    Engine Displacement415 cu. in.
    Camshaft TypeHydraulic Roller
    Cylinder Head MaterialAluminum
    Piston MaterialForged Aluminum
    Carburetor IncludedNo
    Intake Manifold IncludedNo
    Distributor IncludedNo
    Valve Covers IncludedYes
    Cylinder Heads IncludedYes
    Throttle Body IncludedNo
    Timing Cover IncludedNo
    Oil Pan IncludedNo
    Water Pump IncludedYes
    Harmonic Balancer IncludedNo
    Flexplate IncludedNo
    Flywheel IncludedNo
    Air Cleaner IncludedNo
    Spark Plugs IncludedNo
    Spark Plug Wires IncludedNo
    Computer IncludedNo
    Wiring Harness IncludedNo
    GENERAL
    Combustion Chamber Volume68cc
    Bore x Stroke (in)4.000" x 3.750"
    Material TypeIron
    Sold in QuantityEach

    Questions & Answers

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    Fitment

    • GM LM4

    • GM LS6

    • GM LSA

    • GM LM7

    • 6.2 Chevy LS V8

    • GM L94

    • GM LM7

    • 6.2 Chevy LS V8

    • GM L94

    • GM LM7

    • 6.2 Chevy LS V8

    • GM LC9

    • GM LMG

    • GM LY5

    • GM LY5

    • GM LM7

    • 4.8 Chevy LS V8

    • GM LM7

    • GM LS1

    • GM LS3

    • GM LS1

    • GM LS1

    • GM LS6

    • GM LS3

    • GM LS4

    • GM LS4

    • 4.8 Chevy LS V8

    • GM LM7

    • 4.8 Chevy LS V8

    • GM L20

    • GM LM7

    • GM LY2

    • 4.8 Chevy LS V8

    • GM LM7

    • GM LM7

    • GM LS3

    • GM LM4

    • GM LMG

    • GM LY5

    • GM LM7

    • GM L59

    • GM LM7

    • GM LC9

    • GM LMG

    • GM LY5

    • GM LC9

    • GM LMG

    • GM LMG

    • GM LY5

    • GM LMG

    • GM LY5

    • 4.8 Chevy LS V8

    • GM L59

    • GM LM7

    • 4.8 Chevy LS V8

    • GM LMG

    • GM LY5

    • 6.2 Chevy LS V8

    • GM LC9

    • GM LMG

    • GM LC9

    • GM LMG

    • GM LMG

    • GM LY5

    • GM LH6

    • GM LM4

    • GM LM4

    • GM LM4

    • 4.8 Chevy LS V8

    • GM LM7

    • 4.8 Chevy LS V8

    • GM L33

    • GM L94

    • GM LM7

    • 4.8 Chevy LS V8

    • GM L33

    • GM L94

    • 4.8 Chevy LS V8

    • GM LM7

    • 4.8 Chevy LS V8

    • GM L33

    • GM L94

    • 4.8 Chevy LS V8

    • GM LM7

    • 4.8 Chevy LS V8

    • GM L33

    • GM L94

    • GM L20

    • GM LC9

    • GM LMG

    • GM L33

    • GM L59

    • GM LM7

    • GM LM7

    • 4.8 Chevy LS V8

    • GM L20

    • GM LM7

    • GM LY2

    • 4.8 Chevy LS V8

    • GM L20

    • GM L94

    • GM LM7

    • GM LY2

    • GM L94

    • GM LC9

    • GM LMG

    • GM LM7

    • GM L59

    • GM LM7

    • 6.2 Chevy LS V8

    • GM LH8

    • GM LH9

    • GM LH8

    • GM LH9

    • GM LS1

    • GM LS3

    • GM LS1

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