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ATK SP48 Chevy 427CI Short Block Flat Top Pistons

$275 Shipping

ATK SP48 Chevy 427CI Short Block Flat Top Pistons
ATK Engines

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#35020061

ATK SP48 Chevy 427CI Short Block Flat Top Pistons

  • Oil: Conventional / Non Synthetic 10W30
  • Oil Filter: Wix or K&N
  • Timing: Set to factory specifications via PCM module (ECM TUNING REQUIRED).
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$5,880.99

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Product Summary

Short Block Crate Engine Type, No Value Engine Balance

  • Oil: Conventional / Non Synthetic 10W30
  • Oil Filter: Wix or K&N
  • Timing: Set to factory specifications via PCM module (ECM TUNING REQUIRED).
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Key Specs

Crate Engine TypeShort Block
Engine Displacement427 cu. in.
Camshaft TypeHydraulic Roller
Piston MaterialForged Aluminum
Crankshaft MaterialForged 4340 Steel
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Need To Know

Made to Order

This custom item will ship when completed

Truck Shipment

Truck shipments must be pre-paid with a credit card, certified check or money order

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ATK Engines SP48 Details

Engine Specifications:

  • Block: Dart SHP 4 bolt main 2pc rear main seal
  • Bore/Stroke: 4.125” x 4.000”
  • Displacement: 427CI
  • Crankshaft: Scat 4340 forged internally balanced
  • Rods: Scat 4340 forged H beam with ARP 8740 bolts
  • Pistons: 2618 Forged -6.9cc flat top
  • Compression Ratios: 58cc = 12.6:1 / 64cc = 11.7:1 / 70cc = 11.0:1 (can vary due to deck height/gasket thickness)
  • Rings: Plasmamoly
  • Camshaft Bearings: Dura-Bond, installed and clocked to OEM position
  • Freeze Plugs: Brass, installed and sealed
  • Oil Galley Plugs: Installed and sealed

    • Recommended Components:

  • Balancer: Internal balance
  • Flexplate/Flywheel: Internal balance
  • Head Gasket: .038” or per application

    • Engine Info:

  • Oil: 10W30 Conventional / Non Synthetic for first 3000 miles
  • Oil Filter: Wix or K and N per application

    • Notes: Requires a reduced base circle camshaft.

    Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. 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 SP48 Specifications

    KEY SPECS
    MFG. Part #SP48
    BrandATK Engines
    Crate Engine TypeShort Block
    Engine Displacement427 cu. in.
    Camshaft TypeHydraulic Roller
    Piston MaterialForged Aluminum
    Crankshaft MaterialForged 4340 Steel
    Carburetor IncludedNo
    Intake Manifold IncludedNo
    Distributor IncludedNo
    Connecting Rod MaterialForged 4340 Steel
    Valve Covers IncludedNo
    Cylinder Heads IncludedNo
    Throttle Body IncludedNo
    Timing Cover IncludedNo
    Oil Pan IncludedNo
    Water Pump IncludedNo
    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 Volume58cc
    Bore x Stroke (in)4.125" x 4.00"
    AssembledYes
    Material TypeCast Iron
    Sold in QuantityEach
    Connecting Rod Beam StyleH-Beam
    Piston StyleFlat Top

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