The crank shaft flywheel/flexplate bolt pattern on the LS series engines: 1997-2009: 6 bolt 2009+ and all LSX: 8 bolt LS9: 9 bolt The crank shaft on the LS series engines does not extend aft as far as its older small block bretheren thus a crank shaft spacer/adapter plate is requir...
It would be nice if they made an Spin-On Oil Filter Adapter that just had that bolt pattern, but no, we have to make an adapter for the adapter! Not really much problem if you have rudimentary metal working tools. If you don't, you can always purchase a complete or even partial ...