The factory oem brakes on twincams are 242x18mm rotors ventilated.
Im talking about front ones only.
You have a couple choices of replacement/upgrades.
Here are some....
1. Series 2 SX seca / GTi corolla front rotors and calipers
(258x22mm)
2. Levin/Trueno gze/20v ae92 front rotors and brakes
(254x22mm)
3. Levin/Trueno gze/20v ae101 superstrut twin pot calipers and rotors.
(275x25mm) req. modification to diameter of rotor. Will not fit with 14" stock wheels. However ive seen it fit on a 14"mag of some sort. But very close. Risk of fouling.