Ok, let me tell u.
Power Filters are good for mid range power, (2nd-4th gear)
therefore pickup not that good.
And when u tong ur pipe, definitely u wanna go higher top end. So
the mechanic will change the air settings to higher end range. So
when u idle, it will like wanna die wanna die pattern, but your top
speed... will be better...
(when u do something on your pipe, air settings will change
too)
