Performance shields are aluminum sheeting covering the cross members on the underside of the pontoon boat. As a pontoon runs through the water, water is constantly being sprayed up on the underside of the boat. When this spray hits the cross members under the boat, it actually slows the boat, not critically, but to some degree. By adding the aluminum sheeting , the sheeting covers the cross members and allows the water to slide across the bottom.
Lifting stakes are aluminum extrusions added to the inside of the pontoons. They are about 6 inches wide and run the entire length the bottom of the pontoon, usually attached (welded) to the inside of the pontoon. Some manufacturers will add these to the outside of the pontoons as well. These lifting strakes, do just that, as the boat is powered up they help the pontoons lift up. This makes the boat plane faster, plus keeps more of the pontoons out of the water as it is under way. All in all they give the boat more speed and easier steering on plane.
22’ Misty Harbor pontoons when powered with 150hp engines typically run about 35MPH, when adding the lifting stakes and performance shields we have seen 43 to 45mph on the exact same package, 8 - 10mph increase. This makes the boat in my opinion perform as well if not better than triple tube pontoon boats. Triple tube pontoons typically draw a lot more water than 2 tube pontoons. By adding the lifting strakes and performance package you get the better speeds and handling as of a 3 tube pontoon but with a lot less draft and a lot less money!