TTI headers do not require the adapter and they're as good as it gets.
The short filter is not a restriction and works just fine. Most of us never put enough miles on our cars to the point the shorter filter stop doing their job.
So a 10-12 PSI loss across the filter is good with you? Not me. That’s a big restriction before the oil gets to the engine.
Like I said, no GOOD header will take a long filter without that adapter. Even your over rated TTI header can’t take a LONG filter without that adapter.