Anyone know if F5DP0R plugs are acceptable in a 4ksq?? A bit colder then the W7 plug that is recommended. But, I have these plugs laying around and they are nearly new. I don't want to toss 100$ worth of plugs if they will work. Thanx, Shayne P. Oakland, CA. Audis, MBZs & a black sheep BMW. BUY ME: 1988 BMW 528e PARTING: 1972 Mercedes Benz 280 SE 4.5