Engines and Components› Harmonic Balancers

Ross Performance

Subaru EJ20 / EJ25 Harmonic Damper

$630.00

SKU: 704200

Out of Stock
In Stock
Ships by Oct 12
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Ross Performance Parts Subaru EJ20 / EJ25 Harmonic Damper is a high-performance replacement designed for harmonic and torsional vibration protection. It is rated for 600hp and suitable for high-performance street applications.
Show original supplier description
The Ross Performance Parts Subaru EJ20 / EJ25 Metal Jacket Harmonic Damper offers robust protection against harmonic and torsional vibration, suitable for both stock OEM replacements and dedicated high-performance engines. Designed and manufactured in-house, it utilizes advanced technologies like CMM and 3D modeling, coupled with state-of-the-art CNC machining. This damper is rated for up to 600hp and maintains OEM pulley diameters, locations, and profiles for seamless integration. It features a proprietary Ross Tuffbond process for bonding, incorporating anti-vibration and anti-tear natural rubber. The assembly mass is optimized for high-performance applications, and it includes laser-etched 360° timing marks for precise engine tuning. Hardware utilized is grade 10.9 or better, ensuring durability. This harmonic damper complies with SFI 18.1 standards, ensuring it meets safety requirements for performance applications.

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

BrandRoss Performance
Part Number704200
CategoryEngines and Components
5,000+ Trusted brands
1M+ Enthusiasts
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(760) 282-4645 hello@motormia.co

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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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