Engines and Components› Engines, Blocks and Components

ATK ENGINES

LT1 416CI FORGED SHORT BLOCK -20CC

$8,236.12

SKU: A040 SP105

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Special Order
Ships in 4–6 weeks
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Non-Returnable Item
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Description

This ATK SP105 short block is designed for Naturally Aspirated, Boost, or Nitrous applications. It features a new GM LT Block, Manley 4340 Forged Crankshaft, H Beam Rods with ARP2000 bolts, Manley 2618 Forged Pistons, and a Total Seal CS AP ring package with Steel Top Rings. Factory piston squirters are plugged. An ARP Main Stud upgrade is available.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandATK ENGINES
Part NumberA040 SP105

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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