How do you make velocity stacks?

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I'm following a thread that someone has on another forum and for many reasons it has my attention. You will seehttp://www.dsmtuners.com/forums/newb...emanifold.htmlAnyway in the first picture, how do you make those veloctiy stacks on the metal where it's folded back? I've always been curious about this.Torchmate 2x2 CNC with Flashcut CNC controlsHypertherm Powermax45 Esab ET220i Razorweld 195 MigRazorweld 200ac/dc TigTormach 770, Tormach xstechRazorweld, Vipercut/Vipermig, SSC Foot Pedal Dealer
Reply:Dies and a press or spinning.
Reply:Spinning?Oh a dimple die would work wouldn't it. I thought maybe he did it some other way since he is cheap enough to use a fire extinguisher? lolTorchmate 2x2 CNC with Flashcut CNC controlsHypertherm Powermax45 Esab ET220i Razorweld 195 MigRazorweld 200ac/dc TigTormach 770, Tormach xstechRazorweld, Vipercut/Vipermig, SSC Foot Pedal Dealer
Reply:Just looked it up. Spinning is cool!!Torchmate 2x2 CNC with Flashcut CNC controlsHypertherm Powermax45 Esab ET220i Razorweld 195 MigRazorweld 200ac/dc TigTormach 770, Tormach xstechRazorweld, Vipercut/Vipermig, SSC Foot Pedal Dealer