last as long. As I mentioned earlier, I think most would advise you to go new style if you're replacing all 6. There is an extra cost for the fuel rail, but new style will last much longer, and/or be a plus if you ever sell the car. Some would also advise going to 740's because they cost about the same, and then you, or another owner, are covered for mods that require extra fuel. ... Ask Z1 about thier policies.