[gmcsierra2002]

I did the mod last thursday and without a doubt in my mind it has improved throttle response and power. Not a huge difference but you can tell it's there.

I did not show any improvement in milage as yet but have only put on about 100 miles and I did not reset the ecm yet.

I've tried the drop in K & N filters with a stock airbox on previous vehicles & been disappointed. This is a great modification.