I was looking for bov's to replace with the knockoff that i have and ran across this one from thmotorsports

http://thmotorsports.com/turbonetics...base=20734-03-

am i missing something?

the price is perfect and it says it includes pretty much everything yet it says diaphragm only. im kinda confused

 

the bov is 313.00 and just the replacement diaphram is 30.00.

 

what is the diaphragm then? if its exactly wuts right there. thats all i need. i dont really need anything else. i already have the flange and my stuff currently mounted.