Quote:
Originally Posted by soxfan143
The ridges really don't cause enough turbulence to matter. If they did Honda wouldn't use this tube. An improperly angled MAF housing will cause more turbulence than the tube ever will. And this will seriously hamper performance.
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There is more than just performance there. Cost and ease of install are bigger issues than the performance difference between a rough tube and a smooth one. Also, the folds in the stock tube stretch to move with the engine when it rocks.