


Skyjacker 4" 99-UP SUPERDUTY DIESEL
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Skyjacker 4" 99-UP SUPERDUTY DIESELSoftride springs use only American steel and the individual leafs of each spring are shot peened with hard steel pellets at very high velocities. This shot peening compresses the surface of the steel thereby increasing the tensile strength of the spring. Without this shot peening procedure, the maximum wheel travel and ride quality could not be achieved without sacrificing the life of the spring. Softride springs use bolt style spring clips,
Quick Dispatch:
Your Skyjacker 4" 99-UP SUPERDUTY DIESEL orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your Skyjacker 4" 99-UP SUPERDUTY DIESEL ships.
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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.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.7 ★★★★★
Based on 1734 reviews
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Product Reviews
★★★★★ 5
Great product!
Style: Two Pieces
These were a perfect fit for my MB and very easy to install. Great value for the money. They should last given the way they were built.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025
★★★★★ 5
Work good
Style: One Piece
Fit and work perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
★★★★★ 5
WHAT A MARVELOUS AIR FILTER.
Style: Two Pieces
SO FAR THESE FILTERS ARE MARVELOUS. THESE FILTERS ARE WELL MADE ESPECIALLY FOR THE PRICE. LOOKS LIKE A SIGNIFICANT $$$$ SAVINGS. TMP.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 9, 2026
★★★★★ 4
OEM quality
Style: One Piece
Good quality replacement. Perfect fit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2025
★★★★★ 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.
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Reviewed in the United States on May 11, 2026
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