ATI Damper for Subaru WRX EJ20 22 25 Engine 5.50in Alum 4 & 5 Groove

ATI 5.50" Aluminum Harmonic Damper for Subaru WRX EJ20/EJ22/EJ25 Optimize engine balance and reliability with the ATI 5.50-inch aluminum harmonic damper designed specifically for Subaru WRX EJ20, EJ22 and EJ25 engines. Precision-machined from aircraft-grade aluminum, this damper reduces crankshaft vibration and improves throttle response for street and race applications. Key Features Perfect fit: Direct replacement for Subaru WRX EJ20/EJ22/EJ25 engines. Durable construction: One-piece aluminum design resists deformation under high RPM loads. Dual groove compatibility: 4- and 5-groove pulley configuration supports accessory and supercharger setups. Compact 5.50" diameter: Low-profile design for clearance in tight engine bays. Performance tuned: Reduces harmonic vibration to protect bearings and improve longevity. Benefits Install the ATI damper to reduce crankshaft stress, enhance engine smoothness, and support high-performance builds. Ideal for turbocharged WRX applications where reliability and precise accessory alignment are critical. Fitment: Subaru WRX EJ20, EJ22, EJ25. Type: 1-piece aluminum harmonic damper, 5.50" diameter, 4 & 5 groove.