I got a MotoMatic Destroyer for the Gila build. Originally it was a little low so I cut and modified it to fit the rigid swinger bike better. I put together a video of the modifications I made to it. I changed the angle, shortened the baffle, and made a new rear mount.

I also coated the bare pipe with Penetrol paint additive. It acts as a clear coat on bare metal and keeps it from rusting.

This is the same pipe I had on my Puch Polini back in 2010 when I rode it on the freeway. Maybe Ill remake this video when this bike is done!