Reply to "2v or not 2v?"

George PAdmin.

Dave,

No the heads don't truly take the same exhausts, but there is an exception.

Keep in mind the 4V exhaust ports are much larger than the 2V exhaust ports. A 2V exhaust header will be too small for a 4V head. You end up with a large port trying to exhaust into a smaller "hole".

The 4V exhaust header is too large for a 2V head, the large flange of the 4V header doesn't have enough "mating-surface" on the head to make a good seal. The exception, as I mentioned above, the Australian 2V head has a very large flange around the port, so the 4V headers can seal up around the smaller 2V port. There is a port mis-match, you end up with a small port blowing into a larger open hole, not ideal for maximizing power, but it is functional.

Most headers are designed for the 4V heads, but I have heard that Larry Stock sells Pantera exhaust headers designed for the smaller port 2V heads.

George

12/14/0410:09 AM

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