Are you swapping oil pump gears on your 2015+ Mustang GT? If so then you'll want to get a new OEM replacement water pump o-ring as the factory one swells up and once removed from the factory water pump can't be reused. We recommend this o-ring as well as a new crank bolt whenever doing an oil pump gear swap. Learn More
Are you swapping oil pump gears or a lower balancer on your 2015+ Mustang GT? If so then you'll want to get a new OEM replacement crank pulley bolt as the factory bolt is a one time use bolt. We recommend this bolt as well as a new water pump pulley o-ring whenever doing an oil pump gear swap. Learn More
