[tscdennab]

So I noticed some exhaust leaks on my BMW Performance Exhaust, at the clamps. Probably I should of tighten them out again after a few hunderd miles from installing it. All the leaks are after the second catalysts. I plan to tighten them when I install my new 3" downpipes.

Is this a bad thing ? The car runs perfectly. But just wondering...

[Clap135]

Outside of sounding louder, as long as the leak is after the dp/mp connection, it doesnt matter.

[bulldog_yyc]

besides being annoying, what does a leak between the DP/midpipe result in? Some say less boost, why does that happen?

[ianthegreat]

Originally Posted by turkish335

besides being annoying, what does a leak between the DP/midpipe result in? Some say less boost, why does that happen?

Incorrect exhaust readings from your secondary o2 sensors.

[Clap135]

Originally Posted by ianthegreat

Incorrect exhaust readings from your secondary o2 sensors.

The rear o2 sensors don't have any influence on boost.

[ianthegreat]

Originally Posted by Clap135

The rear o2 sensors don't have any influence on boost.

If the secondary o2 sensors were reading incorrect information would they not throw a code?

[Clap135]

Originally Posted by ianthegreat

If the secondary o2 sensors were reading incorrect information would they not throw a code?

Did you bring that up to the guys question about lower boost?

[ianthegreat]

Oh yea, I didn't address less boost because I knew that wasn't correct.

[Imperator]

Originally Posted by ianthegreat

If the secondary o2 sensors were reading incorrect information would they not throw a code?

Potentially, but only if the leak is significant and they aren't manipulated by O2 simulators or a piggyback tune.

[JayKay335i]

Originally Posted by maxnix

Carbon Monoxide

You don't want to breathe it as it is bonded to the hemoglobin until the hemoglobin is replaced. It is best to have integrity of the exhaust system to the rear of the car.

No. It just has a much stronger affinity for heme than O2. Which is why after suffering from carbon monoxide you need pretty much pure 02, and why people can survive carbon monoxide poisoning.