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https://www.ebay.de/itm/Airscoope-Lufteinlass-smart-fortwo-451-schwarz-ohne-Bohren-Klebemontage/362343880056

This appears to be the right one. It is above my price point so I will continue to look. If I was in the UK visiting I would be inclined to bring
it back. Wait a minute says item is in Willich, Germany. Any how this unicornis out there and some day I will run it down at my price point. Or keep feeding my sock drawer to make my price point meet this item lol
It does look real nice, a lot better than the one I have..........Hmm:rolleyes:
 

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Generic Ebay silicone intake tube, stock airbox, New Wix air filter

61hp, 58tq

Thanks for the dyno information. It's helpful to see all of these configurations.

From the charts, I notice the torque comes on much earlier and stays throughout the range. The HP also comes a bit earlier, around 5900 rpm. The Wix filter appears to be a little better than the K&N around the 5200 - 5300 rpm range. In the same range the K&N dips a little on both torque and HP. I'm guessing there is a shift event that happens during that time?

In any case, given the same torque, the K&N only shows a 1hp advantage. Depending on the cost of the filters, this isn't really that much.

Do you have the part numbers for the Wix and K&N air filter used?
 
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