2005 GXP PO410 and PO442

[cougarcat454]

https://imgur.com/Rb3mudIhttps://imgur.com/jXnofij

Have those two codes. Came up with something about secondary air injection system. The two photos are pictures of what I believe is the secondary air injection part. Had to take out the front driver side wheel well liner to access it. Started taking off those small nuts. They would not come all the way off, when I got to the very end of the threads they just stopped turning. Wondering if anyone has replaced one of these, and also if with these two codes is that what I need to be doing?
Any help or experience with this would be greatly appreciated.

[CMNTMXR57]

P0410 (just linked this to another one in this section a week or two ago);
http://www.pontiacbonnevilleclub.com/fo ... 10#p433289

P0440 (which is a sister code EVAP system code to P0442);
viewtopic.php?f=18&t=19788&p=208621&hilit=P0440#p208621