My first Harley. Dealer in Dallas said, we'll cut out the cat for $150., make the bike run cooler. On the way home, ran rough, quit twice. Back the next day. 1 1/2 hrs later:You need the SERT, 10% off, that will be $450. please. did it. Bike ran ok, but R leg very hot in TX heat. Oil T 285 or so on 100 degree days. Read on forum looked around. Plan: S&S EZ start cams, LA chopper true duals which route the rear cylinder L all the way. Local Tuner prefers PCV. Dyno. Now torque ^100. throttle smooth, oil T dn 50 degrees, R leg cool. Exhaust a little louder, but ok. Gas mileage dn a little, but now much more fun to ride, +probably longer lasting. My wife's 2009 softail, we bought used, has V&H pipes. no tuner, must have been reprogrammed. Her oil T similar to mine now. All that time and $ to reverse the epa. O well.