I agree with David Burns.

I wasted over $50.

The part is the 24 LED Matrix bulb: http://autolumination.com/matrix.htm
There are only two part numbers available, 1156 and 1157.

The 1156 has only a single contact on the bottom.
The 1157 has two contacts on the bottom.

The 1157 is what is needed for the amber turn signals. It does not fit the socket on my Crossfire without filing down one of the side pins. They do not provide as much light or fill the lens with as much light as the stock bulbs.