and obvioulsy your notice it if yer put yer foot down
..Someone asked about long term DMG..well i would say more than likely though im no expert but if its chucking in more fuel, then it needs to have the air to burn it,if there isnt enough being sucked in when moving or when at idle then the extra fuel would eventualy do dmg to yer rings etc..but you could prolly say that about any mod in the fact that its not as good for yer lump than if it was running stock..but that would be boring right?