go educate your self bro..i know enough about both and not the lil shit kit rear mount ones.

a rear mount setup done right will have pretty much no less lag then a front mount at all and will make about the same power due to the turbo not being as hot from exh heat which inturn doesn't put as much heat soak on your compressor side,so that means cooler intake inlet temps from the rear vs a front mount.

not hard to figure out..