t-3 heat exchangers

[CaseDogg@aol.com]

   I have a 72 Squareback, the heat exchangers were shot so I went out and
bought a pair of J-Tubes.I was wondering if it's a good idea to put them
on.Do the J-Tube interfere with the smog system on the car,  like the EGR?Is
ther any drawbacks in running J-Tubes, does it effect the cooloing of the
engine?




Casey Engel
--72 squaeback
--82 Cabriolet