great choice of ztube... mine is stillen too. "better throttle response" is an urban legend. the change is decibel volume change which makes your mind think the legend is true. yes your car is breathing better, but with our ETBs there is no real difference....

correct me if I am wrong, but that is the concensus I've always heard and read

 

With the mods I have the Stillen set-up seems to work better than the z-tube/
k&n drop-in.

 

forget KnN drop in filter, get a real intake...

unless you want to spend little as possible

 

Just remove the whole intake all together. place a sock over the intake hole. and go! Hella fast...