[humfrz]

Originally Posted by mav1178

1) Long term, coating does more good than harm, because it exposes the engine bay and electronics to less heat. That simple.

Coating the outside of a catted header is the same. If anything, it helps retain heat inside the header and can reduce cold start emissions by warming up the cat faster.

2) No idea

3) No idea

4) Stock ECU will make your gains very little on paper. Tuned ECU can give a lot more. I guess you can look at it this way: people don't tune ECU and keep I/H/E stock.

I thought that the OP was talking about coating the header back exhaust pieces only ..... not the header itself ..... ??


humfrz