I have a 4.9 liter inline 6 and i want to get an exhaust system for it. Does anyone have any recommendations? Sound clips and pics would be helpful. As of right now im thinking of doing a single in duel out magniflow with lightning style exhaust in front of the rear wheel. Has anyone tried true duels on a 4.9? It does have two manifolds. Any suggestions are welcome.

 

After the cat just have it strait-piped. It sounds pretty nice. Not too loud (unless you ham on it) and not too quiet.

 

Ok,
I know I'm probably gonna catch alot of sh-t for this post, but here goes. I had a 91 f150 4x4 with the 4.9 in it and 35's(no regear). What I did was to chop the last cat(it had 2) and go with a 2.5 si/so magnaflow. I noticed a great improvement in torque and power. I also added a header about a month later. Suprisingly I don't believe the header added all that much to my low end. On the top end is where I did notice some improvement.

 

I to have a straight six, and what i plan on doing is getting a set of headers and getting a gibson cat back system that has the one inlet and comes out to duel outlets but next to eachother( like on the 250's and 350's(92-96) with the 460)..but im trying my best to get a low rumble sound..a couple of weeks ago my muffler disconnected from my last cat..and it sounded like a rice rocket, as fun as it was..i quickely got that fixed..it only sounded nice if you romped on it...