two of everything
 

was on a mustang forum and somebody on there said, "Parts for the Z are expensive because of the v6 and twin turbo configuration, you do have to get two of both for many things; 2 downpipes, 2 testpipes, 2 intercoolers, twin exhauts, 2 BOV." is this true?

yes, but I've never heard of any of the parts you just mentioned being sold individually. They're always sold as a set, in pairs. You ever buy just one sparkplug? One plug wire? One brake pad? One M&M?
No.
The reason the Z parts are expensive is because for one, it's not made anymore. Two, it was an expensive car to begin with. Three, it's a frickin sports car. Tell the mustang guys to mind their own and us Z guys will do the same. :cool:

And becuase the mustang SUCKS.

dont make fun of them its not our fault us z guys can produce over 1000+ hp and well i give stangs some credit but only mach 1 stangs and its only because they have massive torq

umm...to the best of my knowledge....no, Z's can't produce anywhere near 1000 hp. The most powerful Z to my knowledge is Wagz's tt, 744 rwhp. He had to use Nitrous and racing gas to get that number. So I'm not sure where you're getting your information from but you should take care as to what "information" you spread.

My Z can produce 100+ horsepower!

I would hope so!
LOL :p