I Said Never Again, I Bought Hedman Headers... Again.

YY1 said

On all my previous headers, I cut the flange between the ports.

This helps A LOT.

In fact, I've never run gaskets on headers.

Click to expand...

I have never found it necessary, or any advantage to "section" the flange, any breed of vehicle or header.
If the header is designed with a slip tube, it's for a reason.
The sectioned flange invariably gets bent or somehow mis-aligned, a yard ape swings on them or something, and they can be a worse ***** to try and get back on.
One set I had to lower the car on them (crush), to get close enuff to use a pry bar.
Yada yada . .
Don't Do It ! !