Thank you afm and Initial D I am using 30% fuel so the stock .3mm shim should be ok by itself? Most of the tracks I race at everyone uses 30% but this is not jmfra sanctioned racing. I will try spacing the header with the cut 2mm gasket. Still wondering if i can restrict the stinger with 5.2 mm tubing because that would be much easier than buying a new pipe.

Your help is really appreciated.