Need more Low end power

[MingMing]

if u mean retarding ur timing by letting the valves stay open a bit longer, that wont help ur low end either, cuz thats for high end when u can let in more fuel.  u'll prolly stutter at low end...
and the right headers shud get u better low end, if they cause the air to spin right
cuz the faster the exhaust comes out of ur muffler, the better the performance of ur car, so at low end, there is less exhaust, and the smaller opening makes it shoot out faster, but at high end it becoems constricting, although with the proper header, u can make that air spin and it should improve performance in both low and top ends