3.5" Aluminum from trans all the way back. Woolf Aircraft TIGHT RADIUS bends are what make 3.5" over the axle tailpipes possible. We did this successfully on a car with a 9" and 8.8" (8.8 pictures below), both with ARB's. However, neither were mini-tubbed.

Good luck, your build is amazing! I have been following your build thread because I am actually currently finishing up installing twin 7675 CEA's on my car too!

Thanks,
Shaun

 

Money shot! Thanks. Do you have a video of it running? Bet it sounds good

 

This is the only video i could find. The mufflers are rebuild-able, so i'm not sure what packing/if any packing was in them.

if you need some light toilet reading, here is the build thread: http://www.theturboforums.com/threads/346706-395-twin-T70-s-Full-3-5-exhaust-A-C-PS-billet-intake-stock-hood-pizza

 

Nice work! Been wondering the same for a while now. Wonder no more! But the mini tub max fit question would be nice to know as well

 

I fit 4" aluminum from trans back going over the top of the rear end with standard bends but had to clearance alot of the truck floor and even back seat area a little. Fuel cell not a stock tank. I will look for pics at home later on.

 

Looks good.
We took my Art Morrison frame and changed the exhaust openings from round to oval. Oval pipe is the only way to run big exhaust tube and still put the car on the ground without any clearance problems. I have 4" from each turbo to Spintech mufflers and 3.5" tailpipes back from there.