Cheap mods?
A good one is to open up the air intake tract more. Here are a couple pics of what I did on mine. It just takes a little time and some patience.
Cut out the area under where the filter sits.

Here is what it will look like installed.

I took it one step further and cut some off the a/c condenser shroud to allow more air to get into the box at once.

As for cheap mods, that is relative. What you consider cheap others might not and vice versa. I would first look into a lid, then a PnP TB -> headers + catback/duals -> ls6 intake. Also get a mail order tune from someone like Frost, TSP, Slowhawk, ect. That alone is worth a good bit over the stock tune. Once you start doing things like heads & cam move on to a dyno tune. But these things will at least get you on the right track to moving fast and enjoying the car.


