coming from an S2000 most track guys, even national champions in their class, just changed the fluid and the pads. the mustang actually has some good brakes stock, 60-0 is under 110' stock. I would think that some race fluid to handle the heat and some grippier pads would be all that you would need short of serious road racing. the race fluid will handle the high heat of road racing without boiling over. race pads will handle the higher temps and not fade.
you'd think the crazy kits would be better but they usually need to be at a minimum temp before they even work better than stock. knowing that it really depends how you intend to drive the car as to whether it's worth it or not.
that being said that kit does look pretty good and it's a decent price. Bear is a good brand so I'm sure their drilled and slotted discs are fine. it's only 2 piston calipers though, to me if you're gonna upgrade go all out with the 4 piston kits. personally if I come across the GT500 FRPP kit cheap I'll go that route. actually just saw that kit on ebay used for about $500, if I already had the Kenne Bell on the car I would have gotten it
