Originally Posted by Alpina_B3_Lux
As long as you leave the secondary cats in place, the car should be able to pass emission testing. However, if you install catless downpipes, the DME will notice this and throw out a CEL (catalyst efficiency light). The JB4 suppresses this, but does not put the DME into the OBD-ready status that is needed to pass an OBD emission test. This can be achieved with the DPfix from Burger.
I've installed COBB recently and now the clutch is slipping. However, a stronger one is just being installed (ClutchMasters FX300).
Thanks for the info. I will keep in mind the dp fix.
says "The JB4 tuning system includes this functionality built in so a DPFIX is not required if you are already running a JB4 Performance Tuner!"
so if i understand correctly, with JB4 no need for the add on-wires..or the wires are allready in the JB4.