Machine monkey said:
After lots of hard work and not even finishing one car. No bloody way are we gonna be doing this for any one else!!!
I'll second that!
Couple of pics from our day...
Hassle getting back box off! What a pain without a disk big enough! Trip to shop sorted that and and ended up with a 7" disk to get through the pipes
Mat taking off original tips
You can see the modded back box with additional exit put in and new tips welded in place

Figuring out where to put a hanger... Still a little stumped!
Random shot of right hand tips welded up and ready to be mounted (somewhere!)
We commented on taking a few more shots but it was a hectic afternoon of work and we just wants to get the job done!
Sadly had to call it a night earlier than we'd of wanted
Round 2 to come shortly! (With bumper off from now on!!)
Mat (MachineMonkey) did a great job of the tips and other goodies he brought along. A real grafter! Good to meet you mate
Clip of his car with no back box...
The low rumble on idle was gorgeous! For a second we were tempted to scrap the box idea and pop on straight throughs! Needless to say we saw sense!