repackaging dunstall decibel (early model)

[marp68]

They were designed for and most often used in open pipes but I see no reason why the couldn't be used ahead of mufflers as long as they don't get in the way of mounting your muffler.

Another way might be to build a crossover just ahead of the mufflers. A crossover would lower tone and make more low end torque without reducing top end power.

Seems like good things to start with!

Do you mean in front/outside of the "five gun" end part, when you talk about the crossover or the lollipop?

Or do you mean inside but at the open end towards the connection to the exhaust manifold? And if so, with a crossover, do you mean just one or more bolts, nails, wire or something similar that goes across the muffler?