Which rear end do you have?
My 1972 K5 Blazer with a 12 bolt rear came from the factory 4.10s

 

You will have to be more specific, just about every rear end ever made came in something with 4.10-4.11 gears at one time or another.

 

perferabbly gm produts I would just like a list of what had 4.11 stock

 

You still have to be more specific. This gear is an option in almost any GM vehicle. 7.5" 10-bolt, 8.2" 10-bolt, 8.5"10-bolt, 12-bolt car, 12-bolt truck, 14-bolt full floater truck, etc. What vehicle are you trying to find gears for??

 

14 bolt semi floater too, it's got a different ring gear diameter than the full floater does.

 

It might be easier and cheaper in the long run just to get a 4.11 gear set for your diff.

 

My s-10 has 4.10's in it as well, but by no means was it for performance reasons... it came with the 1.9 4 cyl that made 88HP at the crank, when it was brand new. I believe GM used the 4.10's to help the thing be able to safely pull out in traffic....