Do these filters offer any noticeable gain in performance over stock?

I've seen pros and cons to these filters. Mine are already ordered, so I'm getting them regardless...but thought I'd ask.

Some people in the Cummins world have actually shown a K&N FIPK to REDUCE horsepower/torque, thought to be caused by the oil on the filter reducing flow.

How would you compare a stock SRT vs an SRT w/K&N Filters? Probably can't notice a difference, huh?

How about intake noise? Any louder? Is the blower any louder?

Thanks,
Shawn