Quote:
Originally Posted by roundel335
How exactly does a new muffler make the turbo louder (N55 only has one)? I have the MPE and I don't hear it at all. The F30 has ONE muffler, and you're dreaming if you think the dealer won't notice or care about the mods, especially the jb4. Speaking from experience here...
|
The stock muffler muffles/quiets the volume of the turbo. When you add an aftermarket downpipe and/or mufflers, there is less sound restricting material and you can hear the turbo much easier. The MPE probably is probably the least aggressive non-stock muffler out there so the increased turbo sound will be the least with that.
If the dealer looks under his car, sure they will notice the two mufflers but no they won't care. And as long as he sets the JB4 to map0 for routine maintenance, he'll be totally fine. Now if he has a major repair to go in for, he'll probably need to take the jb4 out to be safe.