The Duratec (or an offshoot) is also used in the Lincoln LS and the Jag S type. I checked those 3.0 pics and that front bank header is definitely tubular. Now if I could only find out if it's a prototype or the real thing. The Probe GT from 93-97? used a Mazda 2.5 V6. Same engine in the MX6. Cast headers can be made to flow just as good or better than tubular ones with a little bit of port/polish work. The only problem is the excess weight. What do they look like internally?

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