I just installed K&N's fipk aircharger on my 04 durango. Wonder if anyone can help explain a problem. When I get on the gas I seemed to have lost the low end torque it had stock air filter. Also when I kick it down at 60 mph it does not jump like it used to. I was told that the torque is still there but that it has moved up the power band.? Also I was told that the reason for the slugginess is that the stk air hat held air and when you floored it you had all that air right there. now it has to suck all the way from the filter. Any thoughts on these. Really feel bad I have lost the low end jump. Also will a magnaflow help solve this problem?