Your welcome. Don’t loose your mind over it. As long as you’re close, it’ll be great. There is a time and a place to loose your mind over stuff like this, now is t the time. Again, just try and get as close as possible and rock it.
Getting the LSA and overlap is a difficult thing to do. 99.9% that get it or close to it loose it with a full exhaust style one not fruly well thought out. A pressure wave cancellation box is required or an open exhaust at the same diameter as the headers collector at the proper length is what’s needed. Rare is it ever done and I’ve never seen it. When I do it, most make fun of it or balk at it as not needed, over thinking it, a waste of time and energy if not just outright stupid.
But hey! If they want to throw away 30/40+ lbs of torque, please by all means, throw it away and wonder as a walk away in my car while you wonder WHY my car performs better for what it is. No sweat off of my neck.