I know of many stock 70mm Mustang ones but to go 80mm you may have to look aftermarket
And because you want to some times is all the reason you need , doesnt make it right but its a good enough reason for me
I have done a lot of testing with pipe sizes and driveability , you will have better throttle response and quicker spooling with a 2.5 piping and 3 inch MAF tube , the 2.5 piping and 70mm will support 450-500HP
When you go big , 3 inch cold side , large TB , custom intake your going to hurt your driveability , low end TQ , throttle response , spool time
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