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Airaid Performance Parts
Airaid 400-591
Airaid 400-591 Airaid Throttle Body Spacer 500x225
[click to enlarge]
Airaid 400-591
• Improve horsepower and torque
• Spaces your throttle body out one inch
• Easy, bolt-on installation
• Improves air flow and fuel atomization
• Creates more complete combustion and increased efficiency
• Can be used with any grade of fuel
Retail Price: $146.50
Our Price: $117.20
UPC 642046405915
Free Shipping and Handling for orders over $99!
(US only. Excluding any oversize charges.)
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1Estimated Shipping Dates are based on available inventory and the nearest warehouse.
Performance Parts is an Airaid authorized performance retailer
Product Info Related Items
Application: Truck
Airaid 400-591 Throttle Body Spacer
Fits 1997-2004, Ford F-150 and Expedition with 5.4L V8

You can improve the horsepower and low end torque characteristics of your Ford with this "PowerAid" 400-591 throttle body spacer from Airaid. The "PowerAid" 400-591 throttle body spacer improves off-idle to mid-range performance and the efficiency of your engine. It is made from high quality CNC machined from high quality, aircraft grade 6061-T6 billet aluminum then anodized to resist corrosion.

The "PowerAid" 400-591 will space the throttle body out one inch and create a vortex as the air passes through it due to its unique helix style bore. This vortex action improves atomization of the fuel which creates more complete combustion resulting in torque gains between 800 and 2,500 rpm and potential increases in fuel economy.

Each 400-591 PowerAid spacer is specifically designed for your application and the kit includes all of the necessary gaskets, hardware, and brackets you need. The PowerAid 400-591 Spacer can be installed in less than an hour using common hand tools with no drilling or cutting required.

The "PowerAid" spacer is legal in all 50 states and can be used with any grade of fuel.


AirAid 400-591 PowerAid Throttle body spacer fits:
1997-2004 Ford Expedition 5.4L
1997-2003 Ford F-150 5.4L
Shipping Weight/Dimensions:
Weight:1.10 lbs
Height:10.00 in.
Length:6.00 in.
Width:1.50 in.
Shipping from warehouses in the U.S. and Canada!
Performance Parts has over 20 warehouses in the U.S. and Canada so you can get your parts duty free! Call for availability.
Airaid 400-109
$288.56
Airaid 400-109 Cold Air Intake System
Fits 1997-2004, Ford Expedition with 4.6L or 5.4L V8
and 1997-2003, Ford F-150 pickup with 4.6L or 5.4L V8
and 2004, Ford F-150 Heritage with 4.6L or 5.4L V8
and 1998-2002, Lincoln Navigator with 5.4L V8
Airaid 400-118
$288.56
Airaid 400-118 Cold Air Intake System
Fits 1997-2004, Ford Expedition with 4.6L or 5.4L V8
and 1997-2003, Ford F-150 pickup with 4.6L or 5.4L V8
and 2004, Ford F-150 Heritage with 4.6L or 5.4L V8
and 1998-2002, Lincoln Navigator with 5.4L V8
Airaid 790-550
$11.11
Air Filter Cleaning Kit.

• Regular use maintains optimum performance and efficiency
• Use every 30,000 to 50,000 miles
• Specially formulated to clean filter media without damage
• Provides an extra line of defense against dust and dirt
- Last Updated: 2016-07-08 17:05:15 -
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