In addition to upgrading the exhaust and air cleaner, Stage 2 consists of replacing the stock camshaft with one more appropriate to increasing power. Camshafts, and the way that they interact with the exhaust system, change the power characteristics of the engine. Be honest with yourself (and us) regarding your favoured riding style. For instance, heavily laden two up touring on a Glide requires a different power characteristic to a Softail mainly used for bar hopping. Please note, if comparing prices, that we always upgrade the lifters and inner cam bearing with a cam change.