longbeach, i looked into an oe source for bigger brakes a while ago. The Venza/highlander front rotors are a direct bolt on, with no spacers necessary. They are approx. 1" larger in diameter than the camry stockers. the next logical step would be a better caliper, perhaps a 4 piston factory unit. the on from the tacoma stood out at me. the venza/highlander front caliper would work as well, but the necessity for a caliper bracket with them as they are only 2 piston seems like a waste if you can do a 4 piston the same way. the next step then is lines, which you will inevitably have to make yourself, or source somewhere. these are not hard to make, really. the biggest hurdle that i can see is probably going to be under the hood. with that much piston surface area you will need more brake fluid-this means a better master cylinder. this is probably the most overlooked component of a brake system. if you have more piston surface area, you need the fluid to support it. i haven't really looked in to this so much.
finally, and maybe the biggest issue overall is the ABS. with the new star safety thing you will run the risk of really effing up the ABS computer, particularly the VSC, TRAC, and panic brake assist. Better stopping power is great on the track and the street, but there is likely a reason papa toyota is getting on with pulling all the bbk's right now, and something tells moi its a computer issue with the star safety program.
I believe with the f sport brakes, there is a software update done on lexus'. this overcomes any issue with star safety. perhaps this will be in our future. until then, though, perhaps some creative bracketry for the calipers and a drilled/slotted venza front rotor with some hawk hps camry pads would be the most cost effective and useful brake upgrade. the size increase of the rotor alone would be a HUGE benefit to fade and stopping distance. Although-the addition in sprung weight is questionable.
Oh yeah-I'll say the same thing here as I've always said about brakes.
If you want to stop better, you don't need better brakes, you need better tires. Get better rubber first-that's what really stops the car. Then if that doesn't tickle your fancy, do something crazy!
Good luck, as I've been hoping someone here would get into brakes more than I have-but it seems that for the most part, it's going to be hit or miss with aftermarket stuff and oe upgrades for the tc and is.
oh yeah-the caliper for the tc 2 is mounted differently than the gen7 camry, so that leaves any aftermarket option for a direct bolt on based on the tc alone. it would be nice if toyota would use a few more similar parts.