Hey fellas, as promised here's an update, we installed the headers, cats and the ESR underdrive pulley to see what more we could eke out of it. The black line is the baseline with just mufflers. The blue line is the RS350 kit. The red line is the addition of headers, cats and ESR pulley. No software changes were made. With the EVOMSit software and we were able to make 18 more wheel horsepower and 12 more wheel torque. Remember... this was all done on 91oct. We ran out of time to do 93oct testing, so expect a few more with 93 and the EVOMSit being able to use the higher ignition maps. The addition of these parts took us to 335whp and 282wtq.