I have the same year car and I went with the 4.10's. Most will tell you to get these unless you are planning to supercharge or turbocharge in the future. If you have an aftermarket catback, look for the drone to be pretty signifiacant on the hwy. I have a O/R h-pipe with the stock catback and it is on the edge of being too loud but I can deal with it. I paid 200 to have the gears installed. Shop around for the gears. You can probably find them for around 150.