Here's a few 40 featured verses that go:
Already Know w/ Do or Die
We So Cold w/ Ya Boy and Turf Talk
Sick Wit The Flip w/ Miri-Ben-Ari and Lil Flip
Real Life w/ Talib Kweli
We Pop w/ RZA, Meth, Jayo, WC, etc
The one w/ 3x Crazy- Cant remember the title, it's from Stackin chips, the song starts with 40 sayin, Im just a bill, yeah im only a bill. he rips that shit ridiculously