W/o going turbo u can get an ECU, intake manifold, Cams, Cam gears, delete cat and run bigger piping, throttle body, valvetrain, clutch kit..... there are a lot of things you can do. If you want bolt on power....take a look at Jackson Racing superchargers. They're pretty easy to bolt on and can run on stock internals for a while.

 

the JRSC is more effort and money than it's worth.

 

seems like you have a lot to learn...i'd go with a different Intake manifold and test pipe or highflow cat next. welcome to han