so i have a b20b motor and i cracked the sleeves between 2 and 3 can someone help me and tell me a company that will make a sleeve for me cause i looked and i was told i could not use the darton b18 replacement sleeve,

 

http://www.goldeneaglemfg.com

 

People due use the B18 84mm MID kit in the B20 blocks. The problem that you run into is the 2 & 3 cylinders a casted together so when you machine them they have a tendency of breaking apart down in the main area. It has been done but there is no guarentee it will work until you try it. If you did use the kit you would need to use high temp silicone down in the bottom o-ring area. We used to do the B20 blocks a long time ago but they were not as reliable as a B16 or B18.