Homemade / Modified Mufflers

I've built and modified a few mufflers for the GY6, and here are videos from 3 of them. Maybe they'll give a potential builder/modder an idea of what they want to do.

Here's a chambered muffler I made for a friend's GY6. It's built from scratch in a 2 chamber design.

Here's a simple resonator muffler for the same scoot. I later cut the resonator shorter to make it even louder and raspier. It got pretty obnoxious.

Stock GY6 Muffler Modified. The cheapest and easiest option.