I am a car enthusiast.  I've rebuilt several motors, ported & polished some manifolds...I've done everything short of rebuilding an automatic transmission.  I replaced my aftermarket, cold-air intake with the stock setup using this filter for re-sale of a '01 Silverado LT 5.3, 1/2 ton.  I know that I'm getting better gas mileage with this filter, my Mass-Air-Flow-Sensor is working again, and it seems to actually have increased the torque.  I already knew that it was a quality filter simply by the brand name, and I also knew that it was fantastic deal!