ARH headers arrived today!
Instructor
Joined: May 2012
Posts: 225
Likes: 19
From: Reading, Pa
Jet-Hot is absolutely a thermal coating. It drastically reduces underhood temperatures when applied to exhaust manifolds/headers, etc. You can take a normal drive and sometimes touch a header coated with it whereas a plain mild steel header would absolutely burn you. I'm not saying you'd want to keep your hand there for a ten count but it's not hot to the point that your reflexes kick in and you jerk your hand away. Swain Tech White Ligtning is good stuff as well and probably does outperform Jet-Hot but at a price point much higher. Once intent is met and the header is coated sufficiently to keep it from ruining anything around it, you've reached that point of diminishing returns as far as coating performance.
Race Director
Joined: Jan 2014
Posts: 10,709
Likes: 7,101
From: Fulshear, TX
Melting Slicks
Joined: Aug 2022
Posts: 2,784
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Not sure what your beef is with Jet-Hot exactly. I've used it on probably 10-12 cars over many years. Never had any issues with it. I still have an old VW VR6 that got coated probably 20 years ago on the exhaust header and intake manifold. I'm not saying it looks brand new but it looks good and still works. 
Instructor
Joined: May 2012
Posts: 225
Likes: 19
From: Reading, Pa
Not sure what your beef is with Jet-Hot exactly. I've used it on probably 10-12 cars over many years. Never had any issues with it. I still have an old VW VR6 that got coated probably 20 years ago on the exhaust header and intake manifold. I'm not saying it looks brand new but it looks good and still works.
Race Director
Joined: Jan 2014
Posts: 10,709
Likes: 7,101
From: Fulshear, TX
people think its the bees knees when there is nothing proprietary about their coatings.....the same as any local coater can do but at double the cost....and it does very little in retaining heat inside the exhaust which is the whole goal with coating parts. i assume you have before and after coating temps to verify the coating is "still working"?
Instructor
Joined: May 2012
Posts: 225
Likes: 19
From: Reading, Pa
Race Director
Joined: Jan 2014
Posts: 10,709
Likes: 7,101
From: Fulshear, TX
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Thread Starter
Burning Brakes
Joined: Oct 2019
Posts: 833
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From: Colorado Springs
Race Director
Joined: Jan 2014
Posts: 10,709
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From: Fulshear, TX
Drifting
Joined: Feb 2022
Posts: 1,327
Likes: 64
I'll take the jet hot and after several cars and headers and swaps. They stay nice like you put it on and no flaking off for me. Have set on right now they were on one car for 30k and now another car for 10k and still look like I put them on. Have seen the used the white Swaintech it gets dirty and ugly and flakes off.
Instructor
Joined: May 2012
Posts: 225
Likes: 19
From: Reading, Pa
I'll take the jet hot and after several cars and headers and swaps. They stay nice like you put it on and no flaking off for me. Have set on right now they were on one car for 30k and now another car for 10k and still look like I put them on. Have seen the used the white Swaintech it gets dirty and ugly and flakes off.
Race Director
Joined: Jan 2014
Posts: 10,709
Likes: 7,101
From: Fulshear, TX
the ugly is one thing, you can paint over it whatever color you want.....i dont understand how it flakes off when the "drips" and "overspray" that gets on flanges needs to be hit with a grinder, or with a few seconds a wire brush wheel prior to mounting due to its thickness.
Thread Starter
Burning Brakes
Joined: Oct 2019
Posts: 833
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From: Colorado Springs
Race Director
Joined: Jan 2014
Posts: 10,709
Likes: 7,101
From: Fulshear, TX
Instructor
Joined: May 2012
Posts: 225
Likes: 19
From: Reading, Pa
Instructor
Joined: May 2023
Posts: 223
Likes: 4
Gents,
More times than not, when ceramic coatings flake off it's due to the headers seeing heat beyond what the coatings are designed to handle. The dyno is notorious for that if during the tuning process excessive heat is generated without adequate cooling time in between pulls. Most experienced tuners know what's required. With nearly all of the C8's currently run on dyno's being untuned, it's far more unlikely that C8's with common bolt-ons will generate the type of heat that will damage the coating. Now if you go with Swain, that coating can handle quite a bit more without a hiccup.
More times than not, when ceramic coatings flake off it's due to the headers seeing heat beyond what the coatings are designed to handle. The dyno is notorious for that if during the tuning process excessive heat is generated without adequate cooling time in between pulls. Most experienced tuners know what's required. With nearly all of the C8's currently run on dyno's being untuned, it's far more unlikely that C8's with common bolt-ons will generate the type of heat that will damage the coating. Now if you go with Swain, that coating can handle quite a bit more without a hiccup.