DEVI wrote:why exactly do you guys want rear disc brakes ? if its better braking u want why not upgrade your front pads t o EBC green stuff or some other comparible race brand .Your front brakes do most of the stopping for u anyway about 70% of total . it makes more sense to just upgrade ure front pads and its cheaper.The EBC pads will give u an improvement of about 40%and u can get them at Andys in Valpark
What DEVI says is exactly correct! Listen to Uncle DEVI!...
I have rear disc on my lancer currently and the MOST improvement I got occured when i tried the EBC green stuff!...

But I would be modest and say I got 20% improvement.
Do that upgrade first if U want to get the most benefit for the least amount of money. U may have to machine your rotors if the runout is bad. The pads are costly though.....$730 for the front if U are getting them from Andy. I had to source my rear pads from Dadio.
U could go through the headache of getting rear disc later on. Find a complete spindle
with handbrake cables! You will be glad U did. But like DEVI said, U will only be improving on 30% of your braking, so the gains are marginal at best.
And if U really idle, like me, U could get S.S. braided lines and Slotted front rotors last. They inprove the brake peddal feel but I would say these improve the stock setup by 5%.
My 2 cents.