Jet hot coating. That's all I have to say. I stand by it 100%. doesn't quite look like chrome, looks a little more aluminized but looks awesome none-the-less. Flytime and Wanabe can vouch, it looked good on my boat, didn't change color with heat, easy to clean. The only thing to be careful of when having it done is the fittings on the headers for your plumbing. If they are going to acid dip or sandblast your headers ask them to be careful around the fitting because the acid will weaken the thread and you know what sandblasting will do to them...