I've got an 01 prelude with CAI, D.C. header,racing cat. converter,nology wires,hyperground system,DC short shifter, AEM power pulleys, iridium plugs, tanabe racing medallion exhaust, hondata s200 and a p72 ECU. The car was just tuned on the dyno and i hear a sputtering noise in the exhaust before shifting and during downshifting. it also seems to lag a bit in first gear. Whats going on? Please help.