Hi Kevin, yeah I trimmed a little off the lower left webbing for more clearance, I could of left it but made things a little easier, they are stepped headers, 42mm for the first section nearly to the joining flange then 45mm from there past the block and below and into the collector. Tucked up as tight as I could for maximum ground clearance, same for the collectors which sit partially In the void between the bell housing and the tunnel. I made the lower sections on the car to make sure they fit. im making these to fit past the big starter

. You can see I had to make the right flange sit lower for this reason, With room for a heat shield. Very tight but can be done. They will be ceramic coated when I'm done to help with heat and longevity. I'll be using an engine stay bar to help limit engine movement which allows a tad more usable space. Still in progress at the moment but getting there.
Ben