i have a 2001 cav. and its great... i put a 700$ kicker system in it and new rims and tires

i want to do more

whats the best thing i can do to the cav being money tight?

window tints

window tints
i got window tints today but wat else can i do performance wise

Catback, cold air intake, headers, Iridum Spark plugs, wires, May some rims, body kit, hood. NOS. There is a bunch of stuff you can still do to.