i've been on net and there is hundreds of different coating companys it seems..i've never delt with the coatings on inernal engine parts yet and don't won't to pick the wrong coatings and have them flake off first time i start engine.made this misstake once with headers.found a very reasonable priced coating company .used them.week after i put them on my show car they started turning color and looked like sh*&^;;had to send them to JETHOT COATING [should done this first]they looked as they did when i first got them 3 years later..i don't want to make same misstake again on engine parts.