Why do yo guys keep talking about the b20 sleeves? You are talking about n/a.... you will not crack a b20 sleeve with a n/a setup. Hell a lot of ppl run over 400+whp in their turbo setups. The weak point about the b20 is the rod bolts. But if you are getting rods then you are good to go. And to everybody that doesn't know, the b20 block is the exact same block as a ls except for the bore size, that's all! So the crank and stroke and everything else is exactly the same. You see more "ls" cranks in builds because they are easier to find and produced a lot more b18a/b motors......