New approach to Dino mufflers

I have been communicating with Cliff Donnon of South Australia. He e-mailed me some pictures of a muffler system that he fabricated for his Dino. I believe these are quite well done, with some interesting features. Below I quote his e-mail.

"Hi Jim

Here are the pics of the headers which have been ceramic coated (they had run out of black), and a muffler system which I made using 2x2 chamber boxes.

I included a balance pipe between the two, which has a flange at one end so I can remove one muffler at a time if required. I couldn't post this on the forum because I am not a member.

I haven't altered any fixings on the car so if needed I can bolt the standard muffler back on.

What do you think?

Thanks for your help.
Regards
Cliff Donnon
South Aust."

Jim S.
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Looks great. How will the new system effect performance ??