300c 4cyl.mode

Installed a magnaflow system on a 300c, Sounds great, but when it goes into 4cyl. mode it sounds like crap, Is there a programmer to turn off 4cyl. mode?

You cannot or it will not work right and this is how you get your great MPGs.Also,put in 5w 20 oil only or the acuators for the mds will gum up

Installed a magnaflow system on a 300c, Sounds great, but when it goes into 4cyl. mode it sounds like crap, Is there a programmer to turn off 4cyl. mode?

You should have done more research. The magnaflows are known for their MDS drone.

Don't turn off MDS just because you got the wrong exhaust.

Corsa is said to be the best.