Rather a late update bet meh so what loL!
As most of you will know the GMC exhaust came apart in hastings (yes that long ago!) where me & Dean had rejoined it from sorting the cat out.
Well after several re-try's at just clamping it and failing (the last one being when we were moving!) i finally ended up buying a 3" pipe joiner (from Jetix - thanks dean for heads up) and 2 X think band clamps (from ebay) and a couple of week ago, i got under the truck, took all the old parts off, ground the old cement away and cleaned the exhaust up and fitting new parts...
End result is this:
Should work alot beter as before when we clamped it - the exhaust was trying to pull apart - now due to the joining piece, it is puishing itself together [img]http://www.mkb.cc/forum/smileys/up.gif" alt="" border="0" onload="NcodeImageResizer.createOn(this);" class="bbc_img" />