An S-Runner you say!? Do you know how rare your truck is? Congratulations for picking a winner. I've got a supercharged 2001 S-Runner with positraction myself. Do you have anti-lock brakes? Whatever the case, you can run larger rotors if you're willing to move up to 17" wheels. Before spending that kind of money, go to Auto Zone and ask for their Performance Friction brake pads, part# 4334. They are guaranteed for life, and they're under $40. Toyota Racing Division once marketed these same pads under their TRD badge for more money and with no guarantee. Many of us performance junkies use them, and although they make lots of dust, they deliver far better comliance than the original pads, and they're carbon metallic so they get better when they're heated up. Original brakes are the opposite.
The S-Runner already has a very good 60-0 mph stopping distance (127 feet) if everything's working correctly. If your original brake pads weren't properly bedded, they may be glazed. Otherwise, I can't understand why you'd feel that the brakes suck. If you have anti-lock, then I agree that it sucks, but it's not the brakes' fault--it's the damn anti-lock system taking over the controls.
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