Quote:
Originally Posted by GtiGyver
I currently have the BMW PE v1 exhaust. I find it very quiet, even with the primary cat deleted. I also find it too metallic sounding.
I was wondering what the differences were between these different levels of mods of the original exhaust. I can't find any definitive answers on any forum.
[IMG] https://www.m3post.com/forums/attach...1&d=1504653250[/IMG]
Looking at this picture.
There are 4 areas with vented pipes and 2 Helmholtz resonators.
What is the 2 vs 4 pipe mod?
What makes the x.5 version?
Thanks |
2 pipe - replace two largest vented / perforated pipes with solid pipes. (some wrap them instead of replacing)
4 pipe - replace all perforated pipes with solid pipes
"ACM" - bypass the inner muffler chambers and Straight pipe from back to tips. (essentially muffler delete, but with OEM muffler weight)
I had the 2 pipe mod, with cat delete, it was good. but probably similar to the MPE somewhat in tone. I swapped to a Corsa with TPs. perfection.