It does have cats and they look smaller than what I would have expected? It also has an H pipe not an X pipe. If its running rich or has weak spark what would be the most efficient way of dealing with that? I dont have a tuner or anything. Maybe plugs and wires? It does have 80,000 miles on it? I'm pretty mechanical so is there any adjustments I can make myself? Its not a daily driver so I would prefer it ran a little lean than rich, Any ideas???