I have a 19" flex-a-lite brand flex fan with 2" spacer, was gold painted red. These are universal fans and will fit just about anything with four bolt water pump. Ive used this for years on my f150/5.0 and my centurion/5.8. For those that dont know flex fans are direct drive fans with six thin blades that straiten out as rpms increase. This reduces the fans pulling power at higher rpms when you should be moving faster therefore pushing more air into the rad. This increase horsepower and fuel economy(there words not mine). Ive never tested mpg with or without. This is not a good fan for someone who does alot of rock crawling or uses low range alot as it pulls less air at higher rpms and can cause overheating. The reason im getting rid of it is im going electric and dont need it.