1. You won't pass smog. 2. You'd get a CEL because front and rear O2 sensors will read the same. This is '96-specific. 3. If you're ever pulled over by roadside emission testing, you're pretty much screwed. 4. Think about the environment. 5. If you're making love in the Z when parked in a garage, you're likely to die due to the monoxides.
Is you still would like to get them, the consensus here is that brand doesn't matter much for test pipes.