Does putting muffler after cat reduce engine power?

[kennis827]

hi guys,

I have a m5 2014 CP, when i bought it, both mufflers are deleted, im looking for a budget solution since the car sound at 102db at 4k rpm, and really dont like to waking up my neightborhood in the morning and at nights, i put one dual muffler in the mid (where the m5 non-cp resonator location is), the muffler is magnaflow 3" dual-in and 3" dual-out (this lowers to 92db, which i like it), muffler size is 14" x 7", my question is putting this dual-muffler in the mid would reduce engine power instead of putting two mufflers (3") separately in the end(more expensive solution)?

the pipe is 3" all the way

[13M5F10]

Originally Posted by kennis827

hi guys,

I have a m5 2014 CP, when i bought it, both mufflers are deleted, im looking for a budget solution since the car sound at 102db at 4k rpm, and really dont like to waking up my neightborhood in the morning and at nights, i put one dual muffler in the mid (where the m5 non-cp resonator location is), the muffler is magnaflow 3" dual-in and 3" dual-out (this lowers to 92db, which i like it), muffler size is 14" x 7", my question is putting this dual-muffler in the mid would reduce engine power instead of putting two mufflers (3") separately in the end(more expensive solution)?

the pipe is 3" all the way

Do you have the P/N?

I do not have that answers, I have always been told that the mufflers should always be after the X pipe as it would reduce the scavenging affect.

I have done a resonated X pipe on my car which is Magnaflow and it helped a ton reducing the drone and cold start loudness. Still sounded great. This replaced both resonators and x pipe. The only issue I found after the fact is that this was a 2.5" and I do not believe they make a 3".

[kennis827]

Originally Posted by 13M5F10

Do you have the P/N?
I do not have that answers, I have always been told that the mufflers should always be after the X pipe as it would reduce the scavenging affect.
I have done a resonated X pipe on my car which is Magnaflow and it helped a ton reducing the drone and cold start loudness. Still sounded great. This replaced both resonators and x pipe. The only issue I found after the fact is that this was a 2.5" and I do not believe they make a 3".

hi thanks for the reply!! the thing is that without any muffler when i turn the engine on on cold start everybody wakes up including my family haha
putting one muffler in the middle it quiets a lot and i like that sound... but im concerned if that would reduce my engine power...

the letters says "one dual muffler here"