I went back and cleaned up the original post to make it more concise.

Something to keep in mind when comparing manifolds and prices. Do the "other aftermarket intake manifolds" have a tune with their dyno numbers? I think they do.

Let me address the tuning issue because based on what ive seen in other related threads im not sure everyone gets it. You can bolt these manifolds on your otherwise stock car and expect to pick up power, but a tune will optimize the power and safety.

Every car and the conditions its driven in vary. Hypothetically after EVERY MOD you should check a/f and adjust the tune accordingly. Im well aware thats not feasible for everyone. I have my tune done through Jerry at LET. My tune is a custom combination of when i sent him my modded manifolds and other adjustments he made from other track results. This represents countless hours of dyno time and research on both his and my parts....and MONEY! I am willing to give permission to LET to use anything learned from tuning my manifolds towards tuning anyones ECU as he sees necessary.