Actually even though my airbox is much taller, it does not come in contact with the engine lid and nor does it come in contact when the engine torques over sligtly. I was very carfull when I designed it so that it would fit like a glove. I have decided to offer the same airbox design in an all Stainless Steel version. I can either make it totally stainless with out the removable top or simply put on a stainless cover instead of the lexan(in case you ever wanted to switch. The choice is up to you, Lexan top, Stainless top, or all Stainless. Sincerely, Casey at putsch.1@xxxx