ok listen dip****. the b18a, b18b, and b20 all share the same block. the b18c is different as you maybe stated. i dont think im bull****ting either go somewhere else and ask.. and i know for a fact that the stupidity in you that you will never complete this project nore ever beat a god damn corvette in your civic. with all that said. arguing on here is like running in the special omlypmics. i offered my advice if you just gona knock me then go ahead.. but i do have experiance in building the b20 so stfu.