Quote:
Originally Posted by ryan@ActiveAutowerke
The Active Autowerke X Pipe with HFC has been a proven performance enhancement for the E9X M3. Add a performance pulley and Active Software and your looking at anywhere from 23-27 rwhp. This has been dyno proven on a Mustand Dyno by a few M3 Post members. Eliminating the primary cats is where you will find the hidden power of the M3.
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Do you mean eliminating as in replacing with this product (HFC) or are you saying that there is much more "hidden" power to be had by eliminating the HFC?