You used "flat black paint" to seal the wrap? I'm not too sure that's a good idea. Here you go:
http://www.thermotec.com/products/full/12001/12001.html
I would highly suggest trimming up the turbo heat to fit over your aftermarket downpipe. Here is a thread with some general instructions on trimming:
http://www.scoobymods.com/forums/sho...p?threadid=110