Did anyone install F1 style break light on fit? I am worried how to install it?

 

what are you worried about? That seems pretty straight forward. Attach to lower portion of bumper valence, wiring into existing brake light wiring. done. Not my cup of tea since its an "add-on", but they do look great when integrated into the bumper like this =) That is a JDM rear with mugen lip and lower led brake light.

https://www.fitfreak.net/forums/2nd-...spoiler-2.html

 

It is street legal or not?

 

its easy to install. just take theline from a stop and its all

 

How to wire those cable together correctly?

 

Check that thread I linked...it shows everything he did to install, route wires and connect them.