03. We first took a few dyno pulls to get some base information. Take into account that the stock readings of this bike without the upgraded pipe and air cleaner was 62.1 hp and 78.8 lb-ft and the first dyno pulls we had with the ThunderHeader and K&N; filter were 66.3 hp and 92.8 lb-ft. The findings also showed us that our Dyna was running fairly lean. There were also a few issues with timing, fuel, and spark throughout the curve of our dyno chart that we had to address as well.