I paid $290 for the header and downpipe and $150 for the labor. I noticed that my car started pulling to the side when launched in first. It feels like the torque steer I felt on the Mazdaspeed test drive. I'm gonna get it dynoed next week. The whole combo, AEM SRI, header anf Ractive exhaust should add about 20 extra HP to the wheels, but I'll let you know when I get the dyno chart.