ATI Super Damper Crank Pulley for 4B11 Evo X

ATI Dampers



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The ATI Super Damper for Evo X is available in two versions. The "Street" version offers a 3% under-drive for improved dampening and increased power and is a direct OEM replacement. The "Race" version offers a larger diameter and no belt drives.

Unlike unbalanced underdrive pulleys, which offer no protection to high performance engines, the ATI Super Damper provides balanced dampening of torsional crankshaft vibrations. The 3 external bolts allow for the mounting of A.R.E.'s dry sump mandrel to the damper (A.R.E. p/n 2750B).The ATI damper comes with 360° laser-etched timing marks and exceeds SFI 18.1 Safety Certification.

Vehicle Fitment:
2008-2015 Evolution X 4B11

Damper: Part Number: Diameter: Weight:
Street Version 918253 5.67" (OEM Size) 6.00 pounds
Race Version 918254 7.07" 6.15 pounds
• High horsepower street & race versions
• Dampens torsional crankshaft vibrations at all RPM levels
• Protects against engine harmonics
• Street Version: Direct replacement for the stock OEM damper
• Street Version: 5.67" Diameter 3% Overdriven belt drive
• Race Version: 7.07" Diameter, no belt drives
• Laser-etched timing marks
• SFI 18.1 Certified for competition use

• Shell Material: Aluminum
• Hub Material: Steel 1.0988" Bore
• Inertia Weight: 2.24 lbs

ATI Super Dampers for Evo X (Street vs Race)
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