just wondering... i had a civic before w/ intake & DC 4-1 header... seems like no matter what bolt ons i put on this car it was just plain BS.... no dramatic differences... nothing that was worth the money... the best bolt on i did was the cheapest... some performance spark plug wires(and that made very little difference).... all seemed like a waste of $... the only mod i did on the car where there was a big difference was when i swapped out the motor.. seemed like all the intake did was make my car louder, eat more gas and made it idle funny(even though i oiled it correctly). is this any different in the case of an e46??? do u guys actually notice any REAL increase in performance? what mod out there actually makes a real difference besides nos, supercharger or turbo? i'm talking about a difference u can feel during the course of regular driving and not just cause u beat ur friends car by 1/2 car lengths when u race(ur friend has same car)... basically i think all bolt ons are BS(from experience)... can anyone think of a mod that can change my opinion on this?