Performance Package consists of Sport Headers, High flow Sportcats, Carbon Airboxes, BMC FiltersHigh quality, 14 16 gauge T304 stainless steel, C.N.C. mandrel bent the same length main tubes for optimal energy plus soundFabspeed athletic headers save 10.6lbs/4.8kg within the stock manifolds and don't incorporate a pre cat in the collectorF1/IndyCar layout of exceptional velocity merge collectors for optimum flow and also scavengingInvestment cast lost wax casting inlet flanges better compared to the OEMHeaders may include copper gaskets for very little leaking or perhaps purgingHJS 200 mobile every square inch have catalytic convertersDramatic advancement of throttle response and also...