Recently on a 4hr journey from Boston to Philly, the RR knuckle was bent entering the construction zone at the new bridge. My 07 vin# requires replacement of both "hands". My question is regarding upgrading the suspension parts to 09 specs. I have not spent much time in post 08 vantages so am unfamiliar with any differences. Any help or suggestions would be most appreciated

 

See if you can find a used one? New part does require both rears updated due to change in bump steer.

 

Aston bits has one for a few hundred $. It's a bolt on DIY job if you have some skills. Obviously you're going to have to get a 4-wheel alignment as well.