Quote:
Originally Posted by tominizer
I passed this onto a buddy of mine that knows way more than I do about BMW things. He basically said cats need heat to work, and that usually comes from exhaust flow. It might help enough to correct the signal a little bit but he's skeptical of them being a complete fix. I assume he's stating this because there's no flow at all in these. Any real world testing to back this up.  |
good point....
With the small size of these, I'm not sure if it would take much to heat them up convected through the pipe itself.
I would think someone like Fabspeed would have tested before going to market with them.