Airaid 97-03 Ford F-150 / 97-04 Expedition 5.4L PowerAid TB Spacer - 400-591

The POWERAID Throttle Body Spacer is designed to enhance off-idle torque from 800 rpm to approximately 3,000 rpm. The spacer utilizes it's unique, patented Helix Bore design to spin the incoming air charge as it passes through the throttle body spacer. The spinning air action boosts the velocity of the incoming air and contributes to better atomization of the air/fuel mixture as the air charge enters the combustion chamber. The end result is more part-throttle torque and improved mid-range power.

This Part Fits:

Year	Make	Model	Submodel
1997-2004	Ford	Expedition	Eddie Bauer
2004	Ford	Expedition	NBX
2004	Ford	Expedition	XLS
1997-2004	Ford	Expedition	XLT
2004	Ford	Expedition	XLT Sport
1997-2000	Ford	F-150	Base
2000-2001	Ford	F-150	Harley-Davidson Edition
2001-2003	Ford	F-150	King Ranch
1997-2003	Ford	F-150	Lariat
1997-2003	Ford	F-150	XL
1997-2003	Ford	F-150	XLT
2004	Ford	F-150 Heritage	XL
2004	Ford	F-150 Heritage	XLT
1998-1999	Lincoln	Navigator	Base