Howdy DCJ and All:
I've followed the debate on dividers. Both sides make reasonable claims, however, there is no objective, comparitive data to substantiate either sides claims. I think the best that can be said is that the port divider is neither as good as Clifford claims in their ads, nor as worthless as nay-sayers claim.
We believe in the merit of port dividers for several reason; evening port flow for better balance, less heat transfer to the carb pad and better flow bench numbers. Please note that a true comparison between the siamized port and the split port was not possible because of the nature of the stock siamized ports. We tried to add a section of header pipe to the outlet. Obviously, we couldn't get a header effect without the divider. Flow bench numbers do not necessarily equal HP. We have not done an objective performance comparison with and without the divider. I suspect that the difference would be very small, and then performance increases would likely be only in very specific circumstances and rpm ranges.
We hand fit the divider to a very snug fit with a slight protrusion, so that the header holds it snugly in place. It couldn't rattle even if the welds broke loose. We then have it welded into place at the same time the intake log is being modified. All surfaces are them milled flat for good sealing. To date we have not experience any problems with either coming loose.
The divider is included with the header purchase from some headers. It can also be purchase seperately from Clifford, AutoKrafter Inc. and others.
It's your call.
Adios, David
