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0L BMW F13 650i N63 4
• +10 torque
The outer shell is machined to utilize the factory serpentine belt set-up and mounts to the factory crank via a custom hub which replaces the stock timing gear
• Oil Tempered Chromium-silicone Alloy
STM-DSM-INTK-SD-325-WB
ATI Super Damper Crank Pulley for EJ WRX/STi (917991) ATI Dampers 0L BMW F13 650i N63The ATI Super Damper crankshaft pulley for EJ WRX and STi is suitable for high power street and race use. Direct replacement for the stock OEM damper. The damper's outer diameter is 5. 5" making it a 5% overdriven pulley. Unlike undampened underdrive pulleys, which offer no protection to high performance engines, the ATI Super Damper provides balanced dampening of torsional crankshaft vibrations at all RPM levels. The ATI Super Damper comes with laser