I found this Single Throttle Body Intake, you might wanna go ahead and throw the name Z1 on it before someone else comes up with the design.
And here is another design if you wanna start producing two Z1 STBI's. I went ahead and helped yall put your name on it. I'll set up a donation icon like on your site so you guys can donate me the right funds to pay for my labor for writing your name on it.
Maybe after seeing this, you guys will finally respond to some of the phonecalls and AOL msgs I have sent trying to purchase pistons and many other products but never receive any word or call back even after leaving names and numbers with other members of the Z1 staff. But its to late, i have spent my money with other forum venders. ::shruggs::