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

Marsoni M251S
Sale price$157.99
Pay 4 payments of $39.50 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Airaid 97-03 Ford F-150 / 97-04 Expedition 5.4L PowerAid TB SpacerAIRAID 400 591 AIRAID Throttle Body Spacer: 400 591. The AIRAID Throttle Body Spacer is designed to enhance mid range torque using a patented Helix Bore which spins intake air going through the throttle body spacer. Includes mounting hardware. The AIRAID 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
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.5 ★★★★★
Based on 2188 reviews
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Verified Purchase
Sophia
San Leandro, US
★★★★★ 5
Exact fit, no trimming needed
Style: One Piece
Ordered this for my Ford F-150 and it dropped right into the airbox perfectly — same dimensions as the OEM filter, same end seals, same fit. No gaps, no air bypass around the edges. Clean swap in under five minutes. Engine runs smooth and the price is unbeatable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
A
Verified Purchase
Amazon Customer
Lowell, US
★★★★★ 5
very nice product
Style: Two Pieces
It fits perfectly. Easy to install.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 15, 2026
N
Verified Purchase
neelping
Cuba, US
★★★★★ 5
Good Product and Price.
Style: One Piece
Great filter, fits perfectly. Very close to OEM fit. I have 2015 Mercedes E350, fit perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 3, 2025
A
Verified Purchase
A. Kissee
Dallas, US
★★★★★ 5
Great plug
Style: Single
My car goes through these every 30,000 miles or so. But fantastic plug all around. Performs flawlessly even at almost 9000 rpm.
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Reviewed in the United States on September 11, 2015
E
Verified Purchase
Edward P Shih
Houston, US
★★★★★ 5
Product as described, Works great.
Style: Single
Product as described, Works great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 27, 2015

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