need some help, new want to know some cheap upgrades

[flash50]

i just bought a new 2004 gt and i want to know some more cheap up grades or tricks to make the car faster.... already have bbk cold air intake... flowmaster cat back exst.... bbk underdrive pullys.. subframe conecters and einboch lowering springs. thans for you help

 

[Dr Jay]

You have to pay to play, not much out there for free HP mods

 

[twogts4us]

4.10 gears will make the most noticable difference, but it doesn't add power (sure feels like it though!) Figure to spend about $400 - $500 for parts and labor (it's a precise installation, not one for the typical shadetree mechanic)