Engines and Components› Harmonic Balancers

ATI Performance Products

Super Damper Crankshaft Pulley

$414.50

SKU: 918487

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The ATI Performance Products 918487 is an ATI Super Damper Serpentine Series harmonic balancer. This internal engine balance component exceeds SFI 18.1 specifications and features laser-engraved 360-degree timing marks. It is constructed from aluminum with an elastomer outer shell and has a black zinc chromate finish.
Show original supplier description
It meets and exceeds SFI 18.1 specifications, ensuring compliance for competitive use. The patented design is exclusively created for high-performance engines, offering superior vibration control. Construction involves durable aluminum shells encasing a steel inertia weight. This inertia weight features six (2-ring design) computer-machined grooves designed to retain specific durometer O-rings, which have been dyno-tested for each application. The damper also includes laser-engraved 360-degree timing marks for precise engine tuning and a protective black zinc chromate finish. It comes with a new crank bolt featuring a smaller diameter washer for secure installation. This harmonic balancer is highly recommended for heavily modified engine packages, including stroker engines and applications with significant boost. It is designed with a 15% underdrive and features six grooves for serpentine belts. The outer diameter measures 5.67 inches, and it is internally balanced. Applications include 2011-2023 Chrysler 300 5.7L, 2012-2024 Chrysler 300C SRT8, 2011-2023 Dodge Challenger R/T, 2011-2014 Dodge Challenger SRT8, 2015-2023 Dodge Challenger SRT 392, 2011-2023 Dodge Charger R/T, 2012-2014 Dodge Charger SRT8, 2015-2023 Dodge Charger SRT 392, 2011-2021 Jeep Grand Cherokee 5.7L, 2011-2014 Jeep Grand Cherokee SRT8, and 2015-2021 Jeep Grand Cherokee SRT 392.
Vehicle Symptoms
  • Excessive engine vibration at idle
  • Rough idle after warm-up
  • Accessory belt chirping or slipping
  • Timing marks appear misaligned
  • Check engine light with misfire codes
Diagnostic Codes
  • P0300 – Random misfire detected
  • P0336 – Crank position sensor range/perf
  • P0301 – Cylinder 1 misfire
  • P0302 – Cylinder 2 misfire
Relevant Conversations
  • harmonic balancer causing vibration at idle
  • P0300 after changing harmonic balancer
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  • how to install ATI Super Damper on LS
  • harmonic balancer removal tool needed
  • best harmonic balancer for 5.3L VVT
  • crankshaft vibration after engine rebuild
  • harmonic balancer timing marks off
  • harmonic balancer bolt torque specs
  • replacing harmonic balancer with serpentine belt

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

BrandATI Performance Products
Part Number918487
CategoryEngines 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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