Ah good ol 808's. The truth is that it's most likely different for each mix, an 808 in one song can't always be transferred to your other mix's.
Some things you can try - Parallel compression or what the guy above said, saturation, EQ, limiting, and virtually anything else you can think of thats relevant.
Oh and good drum samples, this might just be the most important thing. Most likely the sample he used already sounded good like that.