<VV> How loud is too loud???

[Brett Wall]

I have a short set of glasspacks to install on my '63 Coupe. I am building an extractor kit like the Fitch Sprint kit, except mating it to headers.

I am facing the headers rearward , then a 2" pipe  180* mandrel U  bend facing forward , insert glasspacks, 180* J bend facing rearward  with tips.

Anyone with experience in this type of exhaust??? How loud from inside the car???