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ATI Damper - 6.78" - Aluminum (2) 4 Groove (2003 - 2005 Mitsubishi Eclipse 4G63 w/ Integral Lower Cam Drive) ATI918251

ATI Damper - 6.78" - Aluminum (2) 4 Groove (2003 - 2005 Mitsubishi Eclipse 4G63 w/ Integral Lower Cam Drive) ATI918251

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Item#:
APPATI918251
$460.97
Price: $437.39
(You save $23.58 )
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UPC:
800157029561
Availability:
Regularly stocked product
LTL:
N
MPN:
ATI918251
Product ID:
361455
Proposition 65:
N
Category:
Engine Components>Crankshaft Dampers
Core:
N
Clearance Item:
N

ATI Damper – 6.78in – Aluminum – (2) 4 Groove – (2003–2005 Mitsubishi Eclipse 4G63 w/ Integral Lower Cam Drive) – ATI918251

Dual 4-Groove Aluminum Super Damper for 2003–2005 Mitsubishi Eclipse 4G63

The ATI 6.78-inch Aluminum Super Damper (part ATI918251) is designed for 2003–2005 Mitsubishi Eclipse models equipped with the 4G63 engine and integral lower cam drive. Engineered for precise harmonic control and maximum reliability, this damper uses a dual 4-groove pulley configuration and lightweight aluminum construction to deliver smoother operation, improved power transfer, and long-term durability. SFI 18.1 certified for race-level safety, it’s the ideal choice for street, track, or boosted 4G63 builds demanding professional-grade performance.

Performance Highlights

  • 6.78-inch outer diameter for precise harmonic damping and optimal fitment
  • Dual 4-groove pulley design supports accessory and cam drive systems
  • Integral lower cam drive improves timing accuracy and vibration stability
  • Lightweight aluminum construction reduces rotating mass for faster throttle response
  • Perfect for turbocharged or naturally aspirated 4G63 engines
  • SFI 18.1 certified for high-RPM, race-legal performance
  • Fully rebuildable for long-term reliability and precision balance

Quick Specs

  • Outer Diameter: 6.78 inches
  • Material: Aluminum
  • Pulley Type: Dual 4-Groove
  • Design: Integral Lower Cam Drive
  • Engine: 4G63
  • Certification: SFI 18.1
  • Applications: 2003–2005 Mitsubishi Eclipse 4G63
  • Part Number: ATI918251

Why Choose the ATI 6.78in Dual 4-Groove Super Damper?

The ATI918251 delivers superior balance and control for Mitsubishi 4G63-powered Eclipse models. Its integrated lower cam drive ensures precise timing alignment, while the dual 4-groove pulley system provides maximum flexibility for accessory and performance belt routing. The lightweight aluminum design reduces rotating mass, enhancing engine response and efficiency. Whether for daily driving or track domination, this damper ensures smoother performance and extended engine life under all conditions.

Frequently Asked Questions

Is this damper a direct OEM replacement?

Yes. The ATI918251 fits directly onto 2003–2005 Mitsubishi Eclipse 4G63 engines with no modification required.

Does it work with both stock and modified engines?

Absolutely. Its SFI 18.1 certification and balanced design make it ideal for stock, tuned, and turbocharged setups.

What is the benefit of the dual 4-groove pulley system?

It allows for separate belt drives for accessories or performance add-ons while improving belt stability at high RPM.

Does this damper improve timing accuracy?

Yes. The integral lower cam drive design provides more consistent cam timing and smoother engine operation.

Vehicle Fitment

  • 2003 Mitsubishi Eclipse 4G63
  • 2004 Mitsubishi Eclipse 4G63
  • 2005 Mitsubishi Eclipse 4G63

Contact Beefcake Racing

Beefcake Racing is your trusted source for ATI Super Dampers and Mitsubishi performance parts. For expert help or to place your order, email sales@beefcakeracing.com or call 1-855-827-7223. Our specialists can help you find the right damper for your 4G63 build, from street cars to full race setups.

CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov