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Engines and Components› Belts and Pulleys

Billet Specialties

6.438" V-Belt Water Pump Pulley, 2-Groove, Polished

$141.51 $119.95 Save $21.56

SKU: BSP-78120

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In Stock
Ships by Aug 1
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30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Billet Specialties 78120 is a two-groove V-belt water pump pulley engineered for Chevy small-block and big-block engines. This pulley features a long pump style and a polished finish, contributing to both aesthetic appeal and performance. The pulley has an outside diameter of 6.438 inches (163.5 mm). Its application is specifically for Chevy small-block and big-block engines, providing a direct fit for compatible setups. The polished billet aluminum construction not only enhances the visual appeal of the engine bay but also signifies a commitment to quality and longevity.

MIA's Description

The Billet Specialties 78120 is a water pump pulley designed for V-belt applications. It features a polished finish and two grooves, with a diameter of 6.438 inches. This pulley is compatible with Chevy small-block and big-block engines and utilizes a long pump style.

Constructed from 6061-T6 billet aluminum, this pulley offers durability and balance. It is sold individually.

Fitment

Fitment Guaranteed

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

Available on iOS & Android

Specifications

BrandBillet Specialties
Part NumberBSP-78120
CategoryEngines and Components

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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