troppo

Ok, just got my dansk cat bypass in the mail today. I can say the quality looks great and weight is only 8# total!

However, they only have a hole in one of them for an 02 sensor. Aren't there 4 o2 sensors? What do you guys recommend to do with them to prevent cel?

I have read some posts about zip tying the post cat sensors but what about the other o2 sensor that is pre-cat??

do I need an ecu reprogram to prevent cel?

thanks as always

TroyN

I have no experience with Dansk bypasses, but you really do want to get ones that allow for the pre-cat sensors. I would think that most ecu reprograms would assume the pre-cat sensor since those provide feedback as to a/f mixture. Maybe they sent the wrong part for one of the pipes if you're saying there is a total of only one tap for a sensor, vs. one on each side. The post cat sensors get hung out of the way and in the fresh air.

TroyN

Looked at a pic of the Dansk bypasses on the Pelican site and it looks like there is only one sensor tap, interesting. If someone here doesn't know, I would contact whoever sold the pipes, or Dansk.

troppo

it is only one sensor tap per pair...hmm

TRINITONY

I THINK..the other two sensors are zip tied and put up in the engine compartment..remember..i think..

troppo

but that would still leave one sensor (pre-cat)???

TRINITONY

https://rennlist.com/forums/993-forum/269942-dach-catless-x-pipes-stalling.html