Exhaust shops in LA

Hey,

I currently have a Magnaflow axle-back setup and want to complete the cat-back, but have 2 questions:

 

1) Are there any recommendations for shops that can do the mandrel bending?

 

2) What size piping should I be asking for? I think I remember reading something like, 3" to Y-pipe to 2.5".

 

Thanks for all the help.

 

Eliot

I don't know if they mandrel bend or not, but AAA muffler on the corner of Venice and La Cienega do tons of custom one-off exhausts. They can fab up anything and make it look good.