For someone who truly doesn't care about criticism from others you sure make a quick jump to such an extreme aggressively defensive attitude in your responses. Personally I'd prefer to see you not buy someone's part and make your own, but to take some time and not just cobble anything together. Another 2 hours, a few more pieces, and rotating the "tip" so that it had some protection from incoming air and this could have been a well made piece.
In open loop (WOT) it will run just fine because the exhaust flow *should* overcome the incoming ambient air. In all closed loop operation (idle and part throttle) it will run pig rich because the additional incoming clean air will be read by the O2 sensor as a lean condition. This will make setting your true Global on Link difficult because you will be perpetually correcting for a condition that can't be overcome because of the front facing exhaust and proximity of the sensor to the tip. To overcome the lean condition at the sensor you may end up dumping an absurd amount of fuel into the engine. I don't think I need to explain what that will do.
Is this going to ruin your engine? Not so much. It just won't live up to it's potential. I guess I figured you high altitude guys would be scrapping for every bit of performance you could get to offset the less O2 dense air.
Again, not trying to start fights.
http://youtu.be/1sONfxPCTU0
For the older people? And the, and the, and the kids?