ok that was confusing...

all GS/GST/GSX's have the exact same calipers in the REAR. the RS has drum brakes in the back.

the FRONT calipers on all RS/GS/GST are exactly the same (single piston). the GSX has dual piston calipers up front. if you upgrade to GSX calipers up front, you will also need to switch to GSX rotors. GSX front rotors are slighty bigger than the RS/GS/GST rotors. i'm pretty sure they will not fit under 14" rims either.

what are you looking to do? upgrade or just replace?

big brake kits are usually just a larger rotor and a bracket to move the caliper farther out to accomodate the larger rotor. as far as performance the most noticable and cost effective gain would probably be from swapping in the GSX calipers up front.

-marc

='95 RS 5spd Red=
Matrix CAI
A'pexi Turbo N1
Hanabi 8000k HID
SPAL Deluxe Power Windows
Nakayama GT5 17's
Ractive STB
GSX Calipers
AEM Rotors

255 is fricken short