Ok, I've been doing a bit of research on this forum. Do you think Magnacore plug wires, ngk v-power plugs, and a k&n filter will net 5 horses? She bought the vehicle with 44,000 miles, and it has 47,000 now. I can almost guarantee the plugs and wires are original. The air filter may be too, but it looked fairly clean when I checked not too long ago.