Powermaster Mastertorque starters churn out up to 180 ft.-lbs. of torque. Coupled with their 4.4:1 gear-reduction ratio, that adds up to reliable cranking power for engines, up to a 12.0:1 compression ratio. These starters can be mounted in multiple orientations, and some will work inverted, with the solenoid down. They feature a black wrinkle finish They'll also clear your oil pan if the OE starter did. Fits Oldsmobile and Pontiac. Starter bolts and shims included.