No they don't, it is just a matter of changing code in the QA table, which must be done for either MAF. JWT even prefers the Cobra MAF as it is much cheaper. Mike --- cowboydren@b15sentra.net wrote: > I don't care who made it. The fact is that JWT has > to do funky stuff to > make the Cobra MAF sensor work with a Nissan ECU. > They don't have to do > funky stuff to make a TTZ unit work.