Are you REALLY trying to cut every ounce you can by going to aluminum lug nuts? Seems a little excessive not to mention the poor material properties aluminum would have given a lug nut function.

From your list of mods, you are not looking for every once of weight saving if you are running all leather OEM seats.

 

Yes, there are better places/ways to cut weight, and it is RIDICULOUS for someone with a FULLY loaded up with options and I.C.E. systems/woofers/etc., still having an AC system, etc. Trans Am to even think about these!

But, that being said, IF I were ever to try these it would be the ones posted on this site (and frrax.com) from Improved Racing.
They are even coming out with high quality titanium ones in the future.

 

if you do go aluminum, spend the money on a nice set and you wont have any issues...you will save about a pound over steel plus they will never rust if you DD the car