This is the power and torque output of my TRX, as measured on Schneiders Dynojet dynamometer. Schneiders MC is located at Upplands-Vasby just north of Stockholm.
There are two sets of curves, one with everything standard, and one with BOS slip-on cans, Dynojet kit and K&N filter. With the modifications there are a power and torque gain throughout the entire rev range. Specially in the low and mid range the effect is clearly noticable. There is still a dip around 3500 rpm, but this is hardly noticed while riding the bike and the engine pulls cleanly from very low revs. In standard trim the engine had to be kept above 4000 rpm to pull clean, although it got better when it was runned in.