ART PIPES VS LTH (F.I or PPE)

indyn

Installation time and cost should be same with either lth or Shorty Header. Stillen does free some HP, plus add the ART pipes should net almost same as LTH or little less?!
But I think with any test pipe its easier to swap back to HFC or stock cats when its emissions time.
Is it possible to add a catalytic converter with a LTH setup in the front or mid pipe sections of the exhaust, this way I can add the cats right before emission testing. It'll cost money but I get to use LTH's.

theDreamer: do you still have your LTH?
Motorydyne ; send me the discounted price.