I actually got an IC that was a tad longer and shorter... it was 26" wide and 10.5" tall x 3.5" thick. It did not fit, too wide. I still have it in my garage if you wanna buy it
the frame rails get in the way.
although the top half is covered, some air flows threw it, and it still functions well to transfer the heat out of the air, although not with maximum efficiency. Anything with a larger cross-sectional area will perform better then a smaller area, whether there is marginal or vast amounts of airflow, it's better then nothing.
Eventually I'll hack up my bumper and reinforce it another way or something when I get my body work done and put a custom bumper on it.