I got the engine light on and local dealer quoted for $6,500??

I'd threaten to complain to Ferrari since you bought the car 4 months ago. New power warranty requires a fairly thorough inspection. Seems like they should have caught this.

If that doesn't work look into putting the $6500 toward a new exhaust system. Might as well get an upgrade out of this

 

The New Power warranty covers:"Ignition/Injection systems: Oxygen sensors, secondary air system (secondary air system pump and valves only)"

Couple of things to check ... what is the length of your state's mandatory warranty for emissions parts (if any) -- as the SAI system has to do with supplying air to the catalytic converters so they heat up quicker and work on cold start. The EPA's warranty is 8 years.

Secondly, a problem with the SAI system will generally cause the car to fail an emissions test ... if your state has one. If it doesn't have one the car is likely to be perfectly driveable as the SAI system only functions for the first minute or two and has no effect on how the engine actually runs. It may keep throwing check engine lights at you, however.

The point I'm making is changing the headers will not necessarily fix the problem with a clogged SAI system. This is a common issue with the Porsche 993, where there are small ports in the cylinder heads that carry the air to the converters, those tiny passages in the cylinder heads eventually clog and it's usually a sign of worn valve guides and a lot of extra carbon. On the 993 it's possible to clean the ports with chemicals (and bass strings, of all things). But the real fix is to replace the original valve guides. The problem may or may not lie within the headers themselves, there is a fair amount of piping and valves that could be clogged; if it is the valves they would be covered, in theory.

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For this kind of repair, I think you are better off if you can find the right independent who is familiar with the problem and it might be solvable for a lot less than $6500 at the dealer. Il Co-Pilota has posted some techniques for cleaning excess carbon that may or may not be applicable here ...

 

Relax, it may just be the battery. These cars are notoriously sensitive to battery charge level, with just the slightest variation setting off all sorts of warnings. A search of this forum will show you multiple cases of this. Here’s mine...

https://www.ferrarichat.com/forum/threads/engine-control-system-failure-warning.643101/

 

Does the car drive normally or you have lack of power or you feel something different since you bought it ?

I had this light and the garage just replaced the Evap leak sensor, was cheap to replace and a lot of people had this light when the battery was old. Do you usuall plug the tender ?