02-19-2022, 08:27 AM | #1 |
Private First Class
36
Rep 107
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hatless downpipes
Can anyone tell me about their experience with this mod -
Have a 2022 x5 m50 I dont really know anything about this so this may sound silly but what does the downpipes actually do ? Are they removing the catalytic converter (ie. catless) ? What does this do to fuel performance if anything? How does it affect sound ? what note/tone changes ? Do I need to pair it with a res delete ? advantage/disadvantage of not deleting ? |
02-19-2022, 08:55 AM | #2 |
Brigadier General
2089
Rep 3,006
Posts |
Removes the cats to allow unobstructed flow.
Not sure about MPG. Obnoxiously loud The rear cats if not removed will likely fail sooner b/c they are doing the job of both. Need to retune car b/c not designed for it Need to code out O2 sensors. Will fail emissions. |
Appreciate
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