header heat shields
 

by not mounting toyota header with anti coating heat instead of mounting heat shields?
coating anti heat aftermarket header is not enough to isolate the heat?
Header coating increases temperature in engine compartment?

Header coatings do not do much for temperature reduction (if anything at all). If you want to lower engine bay temperatures you are going to want to wrap them with header wrap. Pros are reduced engine bay temps and increased exhaust velocity due to higher temps inside them, Cons are reduced header lifespan and possible safety issue if oil ever spills on the wrap and the wrap isn't replaced.

We have done extensive testing on our ceramic coating process. By ceramic coating the outside and inside of the header, the header has become much more efficient. As a quick note on its effectiveness, we can touch/grab the header within 30 seconds of running the car hard.

Your engine bay temperatures will drop, but it does not mean your engine bay will be completely cool simply because you have heat radiating from various components in the engine bay including the engine and the radiator. Our Trackspec Vents have also proven to be incredibly effective in this case. With a large pressure differential, the vents allow the high pressure air in the engine bay to vent properly into ambient, thereby, exhausting the heat from the engine bay. The result is a very cool engine bay compared to without ventilation. :thumbup:

^ Like he said vents + a coating is not a bad idea

My Doubt is:
if header aftermarket assemble ceramic coating (example JDL or similar), the heat is less or the worst case, equal to header header? I would not like it to be more heat.
When you say "our product" to which product you mean?

There will be a reduction in heat, but a lot of coating don't do a whole lot to reduce the heat, but some do work alright (personally not my thing though)

He means their coating they sell. (BTW they are a great vendor/shop)

heat released by headers : header coating heat It is less than header OEM with shield heat ?

Whish someone produce a heat shield for aftermarket headers

This link may have some helpful information

http://www.ft86club.com/forums/showthread.php?t=77107

I have my header and overpipe ceramic coated and it does keep the heat manageable.

No OEM headers will produce less heat then aftermarket ones with a coating I would think. The difference should be small though

Just wrap them and replace your headers when they crack :D That's what I do

Please also note that if tuning is done improperly, the header may heat up substantially due to higher exhaust temps. A good tune goes a long way as well. :thumbup: