What does HF mean? What is the difference between a Crx HF and a Crx Si? Finally, will a H22 or civic type-r engine fit in a Crx? Thanks a million!

HF stands for High Fuel, as in fuel economy. It was produced with (2) versions, one for high altitude and the other for operating at lower (above sealevel) areas of the country. Right now there is another appropriate misnomer for the acronym H.F. which stands for Hard to Find.

HF stands for High Fuel, as in fuel economy. It was produced with (2) versions, one for high altitude and the other for operating at lower (above sealevel) areas of the country. Right now there is another appropriate misnomer for the acronym H.F. which stands for Hard to Find.