I'm honestly not sure as I wasn't looking at the time. I don't think I started looking for a clutch pack for my project until '07. The only reason I went with a 2-piece was because my engine guy had one laying around. I would have preferred a 1-piece since the 502 block is a 1-piece and I could have used a stock LTx kit which I could have found for a hell of a lot cheaper on the boards versus having to buy new.