i use the wizdom (GV knockoff) on my track car.
these bumpers are easily available ,and very cheap. so i dont feel bad when i bust it up. im on my third one.which is also the reason i refuse to paint it.
i like the bumper cause it has that gaping hole for the intercooler,the bumper actually goes all the way back to my IC allowing me to remove the undertray,and still direct the air to the IC.
fitment on the wizdom is sh*t though.