A couple of cycle rags my father reads, both did dyno tests on a different bike. One was a stock H-D and the other a factory S&S Shovel, the only thing they changed was the oil filter and oil and both bikes gained 8hp and 10ft.lbs of torque. What is this miracle filter and oil you ask? Well it's called Pure Power, rather than go into all the details I'll just provide the link to their site and you can check it out yourself. And before you go any further I'll tell you the Lifetime filter costs $199.00
I didn't look to see what the cost is for their specialy blended oils but they say that Shell Rotella (15w40 I think) is nearly the same as theirs. So what I'm asking is do you think a Lifetime filter with a possible 5-8hp and 10ft.lbs of torque is worth $199.00 and would you buy it? And yes they have a fitment listing for the 'BUSA and damn near everything else.
Pure Power LINKY
Pure Power LINKY