430 Muffler - drawing / photo - interior.

Yes, anyone who has a sketch / photo of a opened up standard muffler?

Will do my own muffler this winter. So tired of the sound - stage 1 - and also want it a bit quieter before opening up stage 2.

Have just tried a new Tubi system with a terrible rezornance at 3100rpm.

My idea is to convert a standard system - only the first stage to be more quiet. Will have Fabspeed manifold and sportcats on within 2 weeks. This will probably make my car even lauder.
Have bought some Vortex Cones, but don´t realy like the idea since they will be engaged all time.
The second stage is straight through the muffler and this is OK since you decide when to use it.