What can i get at summit for my SC?

Ok, my mods: 5%, Flowmaster cat back, 3.23 gears, centerforce clutch. My aunt got me a 40 dollar gift certificate to summit and Im not sure what to get. Help me out here...

P.S. I am planning on towing a 500 pound jet ski with it so i dont think UD pulleys would be a good idea.

maybe some airlift airbags so that the rear of the car doesnt sit low or possible rub the tires, i think they are like $60.

how about a nice autometer gauge.

You can use it on a B&M ripper shifter. It's around $165 there. That's what I was gonna get with my gift certificate from there until I decided to rebuild the stock shifter so I used it on a leather wrapped shifter knob.