with the hf I really don't think you would have to cut out any at all. The hf bumper support is only one tiny little beam that connects the two mounting spots. It's really tiny compared to the si.

 

I've got the JRC big *** one and I just made a custom support out of double sided strut:

 

i have a cca ic. with the mounting tabs on top. these would not alow me to fit the ic on the bumper suport(shape of ef bumper is not strait across it goes down on the ends). i had to cut these mounting tabs(actually big thick pieces of alum.) off. and then the ic slid in very nicely,but now i have no way of mounting the ic. so i used some 2'x 1/2" zip ties and pulled it snug to the bumper. u could prob. tow the car with my ic. this is just till i can have tabs welded on it next spring(in west virginia we have snowy winters).

 

i spent like a whole day cutting an fiting, over and over. but jsut keep going, it will fit, by the way i have a 91 dx

 

thanks yall, i called the local junkyard for a hf support and they want 75 bucks so im going to be looking around. i might just run no bumper till i find a hf support!