in hot springs at the harley dealer (state hog meet) they were dyno testing bikes. the dyno man got 6 to 8 more horsepower by replacing stock filter with k&n filter . he also recommended cutting holes in backing plate on air breather .
do you think this helps or can he make the dyno test results show what he wants?
do you think this helps or can he make the dyno test results show what he wants?