the calipers you need are from the sunny N14 1.4 or 1.6 ('90-'95) - they're the same. i think the almera N15 ('95-'99)uses the same calipers aswell, but you'd have to double check.
if you want serious stopping power go for the sunny/pulsar GTi-R or the almera GTi brakes, but these are more expensive and it's been mentioned about being "over kill".
another option is to get the N14 1.4/1.6 caplipers and buy performance discs and pads.
i went for the N14 1.4 calipers with standard discs and pads, and once i'd adjusted the rear brakes and thoroughly bled the brake fluid, they was more than impressive and a lot less brake fade.
hope this helps.
anyway, i'm tired now. ^^^^^ :sleepy: