The rubber seals for the spark plug tubes fit perfectly, but the main seal was too big. It went into the groove to the very last corner which seemed about 1/2 inch oversized. At one point I thought it was there, put the valve cover on but found it popped out. once again. I went to a Honda dealer and bought the original gasket, problem solved. I think the quality of this pad was good but in this particular case it didn't fit well.