10. When designing this head pipe Fuel Moto tried different steps and collectors and found that a true merge collector and a non-stepped primary made the best power overall. According to Fuel Moto its exclusive Jackpot Tandem Flow, large-diameter collectors allow for maximum flow and convergence through the right-side muffler path for maximum performance. Jamie said he chose stainless steel because of its excellent corrosion resistance and heat-dissipation characteristics. The left-side pipe crosses under the chassis like the stock head pipe.