I finally got around to installing the new magnaflow muffler... What should have been a simple muffler swap went south real quick... First off it is definately longer than the previous magnaflow and freaking heavier... Everything started out fine, then i ran out of wire... So i switched to my spare roll of flux core, then damnit it ran out... so i had to run and get another roll.... it took like 4 hours total to weld the damn thing in...

It has about 1/2 the volume at idle, but cruising it is completely quiet! all i could hear is the wind blowing, no exhaust sound... It still has some rumble at WOT but nothing like it used to....

I still have the round 5 x18 in front of this one

I installed magnaflow 12579



compared to old one...



what the inside looks like

 

How does it compare performancewise to your old one?

 

probably the exact same... I did not notice any difference...

 

I am ready to go to a oem duramax/6.2 muffler because my Corsa sport is too damn raspy....and I run cats...Total, are you running 2 mufflers now? and cats? If it is wife approved I am def interested..lol

 

i have always run 2 mufflers in series... I just swapped out the rear one to the bigger one as seen in the above pics... I am not running any cats thou...

 

yes those magnaflows r big.. im running same one but di/do no cats... i only run one tho.. it sounds nice on idle and pretty loud at wot.. but much better then my 14" flowmanster.. i couldnt talk over that one.. this one is nice and at fwy speed it just like blackgmc said its just blowing air out..

 

Glad you liked it, i tell alot people that this big magnaflow will take out all the rasp and drone out of any catless exhaust system

 

ive read that as well, im in for a video of idle, and wot if you got them. my corsa is raspy, and loud as a mo fo and wot, but i just bought the dynomax bullet as a resonator before my corsa, ive never heard of anyone running 2 in series mufflers, but hell, id give it a try. i want something quieter. hope i get it .

 

I don't like the fact that it's not straight through, but IDK if that makes a huge difference.

 

Man i can almost swear the ones i had was straight through?