This 25% underdrive balancer for the 2011+ SRT8 6.4L incorporates a number of high quality features you won't find on any other aftermarket unit and makes up to 9 additional rear wheel horsepower and 10 ft-lbs of rear wheel torque over the stock crankshaft pulley.
Professional Products SFI Pontiac harmonic balancer / damper sports white lettered timing marks from 0-60 degrees as well. This SFI unit is great for your mild to high performance engine. Unit has both BBC and standard Pontiac 4 bolt pattern. Recommended for 500 hp and under