rear bumper reinforcement questions

[LsB16CrxHF]

1988 crx and needs a rear bumper support...doesi t matter if it comes from and si or a dx or a hf...sumone told me the dx and si are different from the hf...anyone kn othe truth...or does anyone hav one forsale?

 

[hcivic.com]

use any one just drill it to fit