Yeah Champion in the US told me unofficially that it adds around 7-10 HP....but surely it does something...but even if it did not, the sound alone is worth every penny of it. Everyone loves it, all say is the best exhaust note car around...not that there are many here to compare. It has a higher pitch note, similar to a ferrari. If you add headers, you will certainly add more juice. I dont care about dyno for now, I see it on the street. There are no 911 or even a 911S (tip) that has been able to match my 0-100 sprint. The 911 turbo is another league, what a sick car that is. Kudos to Tubi.

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The first South American modded reptile ~ 350HP - 4.4 sec 0-60 and 12.7 sec 1/4 mile. But looking for extra 100 HP!