Mine made a huge difference for low end power and there is some top end too but my most noticible gains were low end where i the engine is at 2000 rpmspinning the tires off the start, and i wouldn't even hardly squeak before. Do it, you will not be sorry. The sound down at low rpms is awesome too. My stock filter was dirty so others might not notice the same difference as I did but you can't really go wrong for $60-80,depending on where you get the maf adaptor.
