headers and fuel question

[Corbusa]

Guys I was wondering about putting avaition fuel mix in vette, Good ? bad ? ( I should say mixing it with regular fuel )
and on the headers , I bought OBX and want them ceramic coated , do you guys coat the fake cats , and adapters etc or just the headers.? I'll coat the dynomax mufflers as well , so I guess I should weld the bolt/ hanger on the muffler before coating them .? ... also has any one cut their factory exhaust tips off and used them on the aftermarket mufflers ? they look big enough past the muffler to fit 2 1/2 exits .. I'd like to keep the factory look.. Thanks

[secondchance]

Guys I was wondering about putting avaition fuel mix in vette, Good ? bad ? ( I should say mixing it with regular fuel )
and on the headers , I bought OBX and want them ceramic coated , do you guys coat the fake cats , and adapters etc or just the headers.? I'll coat the dynomax mufflers as well , so I guess I should weld the bolt/ hanger on the muffler before coating them .? ... also has any one cut their factory exhaust tips off and used them on the aftermarket mufflers ? they look big enough past the muffler to fit 2 1/2 exits .. I'd like to keep the factory look.. Thanks

I believe avgas has different additive package due to different environment aircraft operates in. Personally I wouldn't use avegas in my car. If high octane is what you are after check speed shops near you. They carry leaded, unleaded, 98, 102, 107 etc...
I did coat fake cats as well as headers.