Just an FYI guys / girls, I went through 4 auto part stores/businesses and bought 5 types of ignition coils (rockauto.com, advance auto, autozone, O'Reilly's) and only advance auto had the correct fitting ignition coils for my 2006 3.7L SLT, the BWS's are the only ones that fit and clipped correctly with the harness that you slide on the spark plug connecter. Not sure why honestly; however, if anyone has any troubles I hope this helps!

 

Good to know.