Originally Posted by Grizzly
I took a single Flowmaster 40 off my 360 Magnum truck and put Magnaflow duals on.

Lost quite a bit of bottom end power and the sound is awful. Big mistake, I'll never do that again.



The power issue is that the magnaflow is now flowing a lot more air out and has leaned out the mix, you need to have the computer tuned to dump in some more fuel or the poor mans method is to put in a set of 460 ferd injectors from the junkyard.

I am not causing global warming, I am just trying to hold off a impending Ice Age!