Quiet High Flow Mufflers?

[Goat Blower]

If I remember right, there's no difference from 3" to 3.5" under 550whp, or at least hardly noticeable.

[Speedfreak]

Originally Posted by Halon

When you first built it, it was a 3" vibrant resonator, then went to a 3" center in/offset out straight thru Hooker.
You then swapped out that Hooker for a 3" center in/offset out straight thru Magnaflow. While not obnoxiously ricey loud, it was still too loud for what I'd want now-a-days.

Yeah, I want it even quieter than that as you know.

Originally Posted by Goat Blower

If I remember right, there's no difference from 3" to 3.5" under 550whp, or at least hardly noticeable.

I would like to verify that, if it's true, it'll be much easier to make something quiet in 3".