The intake that broke today is infact another the cast one. I have just made a purchase of one of the steel ones from Livefastmotors. It cost me 15bux and is chrome plated, flange welded steel. Like the one pictured above.
I have considered vibrations and heat as a contributing factor and have placed rubber between the seat post and engine, havent done the lower mount as of yet. The rubber subsided the seat vibrations amazingly well. I just think we are dealing with cheap parts and garbage metal. Well ill try the new intake in a few days. Such a shame though since its so nice out