Yes they are the same, so is the ALH from what I have read. But finding an oversize ring from someone other than Prothe is hard to do. Especially when I have the first oversize .010" not .020" over. My dealer said he can get them but it is pricey at 170.00 so I figure I would ask the forums. I think I should be under 100.00 with shipping, but no one seems to have them.