Yup, they're supposed to like like peashooters. I printed out tons of pictures on the web and showed it to the fabricators. Since they were only used to making mufflers for mopeds, they were really motivated to do it just for the sake of challenge. It's made out of Stainless steel, so I should have no problems with corrosion in the long run. The Mufflers themselves are glasspacked, but the cones are easily removable and the packing replaced.
Funny thing though, the peashooters are more quieter than my old clones, but they have this really low, throaty sound which sounds pretty nice as the RPM's go up.
What's really nice is how much it costed me. The guys who made them asked for 4000 pesos. That's around $85 in the U.S.