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OMG!! Here I was thinking I would throw a rod at 2400 rpm.For you guys that are worried about the 2100 rpm limit, I have a friend that pulls with his truck and has the rpm set at 4000. At 60 pounds of boost and 1000 psi of rail pressure,he is getting about 1500 horse power. All stock bottom end.Even with steel pistons. He has used the same bearings for 3 years in a row now.But I do not know the limits of the allison transmission as far as rpm.