Extraordinary claims require extraordinary evidence. It's the claimant who bears the burden of proof, not the critics.
Lots of dynos here. If the manufacturer or distributor is really interested, it is very easy to set up an impartial test.
Also, I improved economy 10-15% with nothing but illustration board and duct tape. But I actually documented and tested this via an A-B test with multiple data points.
http://www.topgear.com.ph/features/f...g-a36-20160402
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Only reason I haven't done this on my personal car is a.) It looks ghetto, and b.) I don't have the time to fab up a better looking fiberglass kit.







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