Introducing our expertly engineered heads for Mercury V6 2.5L engines from 1991-2005. These heads feature removable pucks to select an infinite range of compression in just a few minutes. They also feature a 1/8” npt gauge port for accurate temperatures. We recommend using NGK BR9EIX spark plugs.
These heads fit all 2.5L engines, except the 280 bolt pattern.
Please select which CC chambers you would like, they range from 17cc-36cc. If there is a custom size that is not listed please send us an email and we will see what we can do!