heres some things to consider this is a direct quote from someone who actually has it if money aint an object go for it
i think hes in the boards but forgot his name this quote was from nc
"There is a lot of work involved including having to cut the rear fenders by about 2.5". Molding is not required nor is it recommended because of chasis flex eventually causing cracks in the kit. Yes there are some GT-300 owners that have molded it, but mine is not and it looks great.
Other things you will need are wheels/tires since you will look silly if you don't get the correct offset. You will need a new suspension system if you don't already have an adjustable height suspension. The reason why you need adjustable is because you will need a specific height for front and rear that no lowering spring offers. Plus you will run into situations where you may need to lower it or raise it.
Okay most important is cost overview of the project. These figures are strictly retail or a close estimation. Basically what I would have spent if I would have paid retail for mine.
GT-300 Aero Kit - $3,500
Install/Paint - $3500
Correct Offset Wheels - $3,500
Tires - $1,300
Good Suspension - $800 to $2200
Hope this helps. Let me know if there are other things I can help with including getting the kit and wheels/tires."