Sorry guys the FL-1Hp and CM-6731FL-1A are not the same. The FL-1HP has been discontinued and was supplied by Motorcraft. The new replacement is CM-6731FL-1A and is supplied by Ford Racing. The old FL-1HP is a paper element the new 6731 is
synthetic. Alot of old stock FL-1HP out there. I can only assume their micron is the same.
Either buy the FL-1A or the new CM-6731FL-1A, both available through summit or jegs. I plan on pulling my FL-1HP and installing the 6731 since I know the micron rating of 20 and bypass pressure and it has the
synthetic media. I will post dp results.