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Engines and Components Crankshafts and Components

Aeromotive

Aeromotive Billet LT1 Crank 34% Underdrive Pulley

$147.62 $138.90 Save $8.72

SKU: A006 21101

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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: 21101

Aeromotive Inc. is a true high performance aftermarket manufacturer specializing in fuel delivery and fuel delivery components. Utilizing aerospace tolerances and procedures, three generations of track experience, and a meticulous approach to engineering, Aeromotive Fuel Systems has become the absolute pinnacle of performance fuel delivery.

Billet, LT1 Crank. 34% Under drive Pulley (Serpentine Belt).

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

MIA's Description

The Aeromotive 21101 is a billet aluminum underdrive pulley designed for GM LT-1 engines with a serpentine belt. This pulley offers a 34% underdrive to reduce accessory loads and increase rear-wheel horsepower. It is CNC-machined from 6061-T6 aluminum for durability.

Fitment

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Specifications

BrandAeromotive
Part NumberA006 21101

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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