Rep Power: 0

when putting a new mod to your car, do you have to break it in to get the full potential increase of the mod?..
i.e. -i'm getting a megan header and testpipe. right after i install them, will i automatically feel the increase? or do i have to break it in first??.. i know i won't feel that much of an increase but i was just wondering....

 
Rep Power: 292

i think you will feel power once you install them and then eventually it will break in and get a little more