Originally Posted by Singletrack
The o2 extenders that fabspeed sells with their cats do work. Ive gone over 3k miles without a ses light. It's at least long enough to pass the readiness test for inspection. Without the xtenders I would trip the light every 30 to 90 miles and never pass readiness.
2013 M3 Coupe-MR/BLK ZCP, ACM test pipes, BPM Stg2 dev. tune and Megan catback, more to come
Previous rides: 2011 M3 Coupe-MR/Blk
2007 Porsche 997C2S Speed Yellow/Blk sport seats
2004 BMW M3 Imola/Blk