Greetings to all of ya...I'm a new member on the 'boards; first post...anyway...
I also mounted a cherry bomb on my Sube ('84 4WD 4-spd non-turbo wagon), using shims and clamps...kinda honky looking but they work none-the-less.
That was about a year ago and now the clamps have been ravaged, and the "clamping system" a.k.a. bailing wire, is rather loose. I've tightened it several times, but the clamps holding the bomb onto the orig, pipe have lost thier hold, and can't be tightened so the unit has a bit of sag...and less clearance.
Can't tell now as I'm used to it, but the sound differance was nice from what i had. When I originally installed it, I was mounting a new (well, junkyard new) front catalytic piece, stained with the previous owner's maintenance neglect...that finally burned off last week, so no more bad smell...