


Aeromotive Adjustable Regulator - EFI Bypass - (2) -6 Inlets/(1) -6 Return
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Aeromotive Adjustable Regulator - EFI Bypass - (2) -6 Inlets/(1) -6 ReturnThis EFI Bypass Regulator encompasses features and benefits only found on Aeromotive regulators and in a new smaller and lighter package. Capable of supporting applications up to 1000 HP, the 13129 EFI Bypass Regulator can handle high flow EFI fuel pumps and the most aggressive street machines; especially those looking for a cleaner, lighter solution where performance is critical or where space is a premium. Base pressure adjustable from 40 75 psi.
Quick Dispatch:
Your Aeromotive Adjustable Regulator - EFI Bypass - (2) -6 Inlets/(1) -6 Return orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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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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4.0 ★★★★★
Based on 595 reviews
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Product Reviews
★★★★★ 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.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
★★★★★ 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
★★★★★ 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
★★★★★ 5
good name bosch ,works well
its a bosch it fits does not leak so its good in my opinion
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026
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