My experience is with a larger Car Chemistry baffle as opposed to the individual zoomie pipes, but on mine I used one anchor point (a nut welded to the inside of the baffle ring), and over time the combination of exhaust heat and exhaust pressure deflected the entire baffle assembly toward the exhaust, creating significant leakage around the baffle. The CC baffle rings are something like 14 gauge metal, which is pretty thin. It might not be an issue with the smaller diameter tube/baffle interface, but I ended up trashing my CC baffles and making some from scratch using heavier materials.