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Go on this page and click on
Audi S4 or Audi RS4 (on the RS4 results page you can see how the product looks like under the hood).
http://www.bmcairfilter.com/Visdyno.asp

For the Honda s2000 they wrote the results for the acceleration 0 to 100km/h (0 to 62mph), the 1/4 mile performance as well as other details.

Do you think it's worth it ? I think it's far superior to the K&N 57i induction kit that makes the s4 get less power (!).

Not as easy to fit as you might think or hope, but when fitted because of the vanes before the exit of the air filter the air is made to swirl which the maf sensor does not like - i got better results with the standard air box and a K&N panel filter.

R.

BMC makes an S4 or RS4 lose power, period.

We sell a few and always get good gains on Clio 172/ 182, M3 BMW's and also most 300bhp turbo cars, but I have heard that on high power turbo'd cars, the CDA can become restrictive.