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AIRAID 450-638

AIRAID Throttle Body Spacer
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4.7 out of 5 stars 3 Customer Reviews
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List Price: $170.29
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$136.23 USD


The AIRAID 450-638 fits some Ford F150, Ford F150 Raptor, Ford Mustang Boss 302, and Ford Mustang GT models. See vehicle applications for details.
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.

[More Information on POWERAID Throttle Body Spacers]
  • Made from aircraft quality billet 6061-T6 aluminum
  • Improves low end torque and throttle response
  • Gaskets, hardware and precision brackets are included
  • Installs in less than 1 hour
  • No drilling or cutting required
  • Provides stronger mid-range power

Part 450-638 Product Specifications

Product StyleAIRAID PowerAid
CARB EO NumberD-609-10
Street Legal In All US StatesSee Vehicle Applications
TUV Approved (Europe)No
Weight0.8 lb (0.4 kg)
Product Box Height9.75 in (248 mm)
Product Box Length6 in (152 mm)
Product Box Width1.5 in (38 mm)
FinishAnodized Red
Gaskets IncludedYes
Material UsedBillet Aluminum
Mounting Hardware IncludedYes
Thickness1 in (25 mm)
Warranty12 Months - 24,000 Miles
WARNING: Cancer and reproductive

Product Reviews

September 6, 2018 - Part 450-638
Nice fit.. Easy install.. I have the cold air intake package also.. Not sure of the performance/gas mileage gains, but I would purchase both again.

Neel Flannagan
Aiken, South Carolina
April 21, 2017 - Part 450-638
Installed on 2013 F 150 XLT 5.0 liter. Equipped only with K&N K77 cold air intake and 2.25 true dual exhaust. 10 minute install, fit perfectly. I have used for around 400 miles. Better mileage, went from 14.4 mpg to 17.3 mpg My driving style is semi aggressive. Low end power has increased enough to notice, and throttle response is improved. The only reason I didn't give five stars is the whistle. If the whistle was constant it would be better. It isn't so it only irritates me. I would recommend this product to anyone. Works good, looks cool. Airaid should throw in a free sticker and advertise. Hint hint

September 2, 2015 - Part 450-638
Works good.. Happy with this product

McAllen, Texas
   Review part 450-638