I havent had a chance to test it properly yet.Got the chance to take it out yesterday for the first time since fitting it.Loaded it up in the car,took it to some football pitches,warmed it up and was just about to dstart tuneing and the bloody battery died .The bottom end seemed a bit sluggish but that was at factory settings and like i say just as i went to tune it up that was it.On HBF it was makeing better power than the hpi tuned pipe on a dyno.Its not going to make as much power as a Dom but it doesnt make no where near as much noise.liveing in London there was no way i could run the baja with the Dom on but with the RD Logics pipe i should be ok