I am planning on modifying my air box lid. I am going to cut out the square piece toward the back of the lid. Then I will be placing some of that outerware matrial from the inside of the whole. I will use silicone at first and see how that works, then possibly riveting little metal strips around the inside where the silicone is. I will post pics as soon as i do it. I ordered a 175 and 180 main jet to give me some play with it at first.