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Engines and Components› Harmonic Balancers

Professional Products

BBC 8in Harmonic Damper - SFI

$381.07 $205.09 Save $175.98

SKU: P021 90004

In Stock
In Stock
Ships by Jun 7
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Professional Products 90004 is an 8" internally balanced harmonic damper designed for Chevy Big Block 396/427 engines. It features a robust bonding process and clear timing marks, and is SFI rated for high RPM engines.

Fitment

Fitment Guaranteed

Don’t gamble
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.

Available on iOS & Android

Specifications

BrandProfessional Products
Part NumberP021 90004

Videos

ATI Super Damper Install...#14 Chevy 454 Big Block Performance Build...

ATI Super Damper Install...#14 Chevy 454 Big Block Performance Build...
Pro Products Harmonic Damper Install

Pro Products Harmonic Damper Install

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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