I was wondering what is the best fuel pump and injectors to go with D168Y with Greddy TD04H-15G

1)Walbro/BBK 255lph intank high-flo fuel pump
What does it mean when a ECU is chipped?

2)RC 440cc injectors w/ custom harness clips

 

walbro is the best pump you can get pretty much, i'm running 450's with a walbro pump. chipp'd ecus.. exactly what they mean.. usally the chips have diff rev limits, more fuel less fuel at certain rpm pionts and diff vtech engagements if you have vtec