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I dispise dynomax, my first muffler was a ultra flow x muffler, every 6 months the packing blew out in the muffler, so even if it was a bad design, dynomax is dead to me.
Never heard of spintech, kinda gives me the impresion they stole the TB spacer that supposed to create a vortex and in turn are using the same idea in a ex system.
