I have a `91 Z28 5.7 and in the market for some headers. The problem is, I bought an off road kit from Jegs, a direct replacement for the dual cats (not a "Y" pipe) which fits the existing cast iron headers. Is there a set of headers out there that will fit this kit, or one that will work with the original dual cat setup? I live in Florida so I don`t have a problem with emmisions.
Thanks.

 

As I've said before, no, nobody makes headers that fit with the stock y-pipe, and nobody makes a y-pipe that fits with every set of headers. Headers and y-pipes are complete units that go together, they are not mix-and-match.

And yes, you do have a problem with emissions. Every street car in the United States is required by Federal law to keep all emissions devices on their car, and not disable or tamper with them. Even if your state doesnt check, you still must have them.