will a 80mm maf give more performance over a 73mm on a stock with a k&n filter??

 

no.

 

Will a 75mm get me anything over a stock one?

 

with your mods i think you would be fine with a 75, however in my opinion that is on the higher side of fine, as in you would probably be better off with a 70, but you will see a difference with a 75. On a completely stock car though there is no reason to have an 80mm maf.

 

the only reason im geting the 75 is im going to get a blower soon and everyone said i would need one

 

well a 73mm and a 80mm are the same price on summit but thanks ill go with the 73mm.