It's an I6, not a V-6. Big difference Anyhow, I've heard that the Flowmasters sound decent on the ol 4.9s.

And sinep, get your truck year and engine correct. Any pre 97 F-150 will have a 4.9 I-6, a 5.0 V-8, and a 5.8 V-8. Any 97+ F-150 has a 4.2 V-6, a 4.6 V-8, or a 5.4 V-8.

 

I6.... V6.... all have 6 cylinders, you knew what we meant

 

Yea I know, but the 4.9 I-6 sounds a lot better with exhaust than a 4.2 V-6 does.

 

Interesting... Enlighten me, because of the displacement?

 

That, and the design (V or I) of the engine. The I6's sound throatier and deeper IMO. And usually the inline 6's are bigger than the V-6s, so that helps out in the sound too.