Originally Posted by Top_Gear
Wondering the same thing.
But this mod appears to be irreversible as it requires cutting the OEM exhaust. I am sure that at some point I will want to return the car to stock with no visible signs of "surgery" showing underneath
I would imagine you could clamp the stock cats back in place for the smog check? And hopefully they won't be too careful with the visual inspection.
Also, any decent exhaust shop could weld the stock cats back in. Shouldn't be more than an hour of weld time if you bring it into them.