I basically will have to make a .1" transition in the thickness of the flange. I contacted AFR and was very disappointed in their answer. Basically they made a large port with no provisions to connect properly to any off the shelf exhaust system. I would think a smaller port but smooth connection to header would outflow bigger connecting to smaller= turbulence? Here is their reply:
Hey Will,
You are not going to find any headers off the shelf that will completely clear the port. The problem is the stock 2" bolt pattern, then factor tube thickness, weld thickness, then room to actually remove and install the bolts. Just doesn't leave manufacturer's much to work with. Feel free to contact me again by phone or by e-mail with any further questions.
Thank you for choosing AFR,
Jason Dow
AFR Tech./Sales Dept.
(661) 257-8124 Ext. 124
Am I too much of a perfectionist or is this mismatch an expensive mistake on my part?