i thought these would clear the 15" stocks w/ some modifications; however, no matter how much spacers you use or how much caliper you try to grind down, these will not fit under the 15" ser wheels.

Anyhow, the difference is significant enough. I notice i do not have to apply much pressure for the car to stop now.
I like it, but I should of went w/ the full caliper & rotor.

Anyhow, here are some pics
http://img.photobucket.com/albums/v225/chironaka/sentra.jpg

http://img.photobucket.com/albums/v225/chironaka/brake.jpg

thats one clean se-l