This might seem like a stupid question but if you put long tube headers on an iroc do they have a y pipe or do you just have to run duals? I also have dual cats on my '90 iroc. I like the power of the long tube headers but don't know what do. Please help. If any one has pics please post.

You can go a bunch of differnt ways here. They make some y-pipe for long tubes but they are not specific to our cars. Many guys just get one made up or run true duals. Most run the true duals when they go with longtubes.