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Engines and Components› Harmonic Balancers

ATI

Harmonic Balancer

Name: Harmonic Balancer
Brand: ATI
SKU: 918522

$453.27

SKU: 918522

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Description

The ATI 918522 Super Damper is an aluminum harmonic balancer specifically designed for the 1994-2005 Mazda Miata 1.8L engine, catering to both high horsepower street and race use. This damper functions as a direct replacement, effectively dampening torsional crankshaft vibrations across all RPM levels and safeguarding the engine against harmful harmonics. Constructed from aluminum with a black finish, this 5.5-inch diameter harmonic balancer features an internal balance type. The design aims to improve engine longevity and reliability under demanding conditions. While the JEGS listing states mounting hardware is not included, other sources indicate that hardware and a keyway may be included with certain versions of this part, such as the 918522BG. Buyers should verify the exact contents of the package.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	ATI
Part Number	918522
Category	Engines and Components

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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