RCZ, Great write up and impressive results.
But I must say, these results were somewhat confounding based on your earlier dynos. You said that when you dyno'd with no filters, you saw no gains. Suggesting that air flow through the filter was not a limiting factor. Now however, you see 15-20HP gains with the long tubes. If the filters truly make no difference in HP gains, then we are led to believe that 20HP gains are to be made by rerouting the air to the throttle body through these tubes rather than the stock airboxes? Is the stock airbox design that poor/restrictive?
Promising gains regardless of where they came from. I don't care if its some STILLEN black magic trick. This is a significant step toward the 300HP N/A mark.