For a C4, 10.5" 157 tooth converter. 8" Ultimate Converter. 5900-6000 stall on my 347. Its actually at UCC right now and will be cleaned up by him then I can ship to you. Going to a 7" deal so this has got to go. 600.00 Shipped. I know not many use this sort of stuff, but anyways maybe someone is looking for one.