evo brembos are 2 piston rears...... and they bolt straight up
3000gt vr-4 rears are 2 piston rears...... and they bolt up
but i still think the OP is confused
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for the front just pull the old stuff caliper and rotors, then slide on some 6g vr4 rotors and some 6g/1g dual pistons or 2g dual pistons. with 2g you bolt all the new setup on then just switch the lines as the dual piston 2g is the exact same banjo bolt