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[MRX] 4JJ1 MAIN CAP
[MRX] 4JJ1 MAIN CAP
[MRX] 4JJ1 MAIN CAP
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[MRX] 4JJ1 MAIN CAP

Marsoni M251S
Sale price$459.50
Pay 4 payments of $114.88 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
[MRX] 4JJ1 MAIN CAPMRX Billet Main cap , you will need to line bore your block to make them fit.
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  • 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
4.4 ★★★★★
Based on 578 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
Chelsea, US
★★★★★ 5
Great Engine Air Filter For Honda Accord Speed 2.0 2018
Size: (Pack of 1)
It is one of the 2 engine air filters available on Amazon for Honda Accord Speed 2.0 2018. I see the same quality as the original OEM engine air filter. Perfect fit. The other one is ‎K&N 33-5074, but at a much higher price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2024
G
Verified Purchase
GradyPhilpott
Port Orchard, US
★★★★★ 5
It Fits
Size: (Pack of 1)
It fits and the engine hasn't blown up yet, so so far so good. More to the point, the increased air flow has yielded better gas mileage and engine response.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 15, 2025
C
Verified Purchase
CM
Carnegie, US
★★★★★ 1
Does not fit 19 accord
Size: (Pack of 1), Size: (Pack of 1)
Does NOT fit the 2019 accord. Literally just tried it and it’s too big.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
C
Verified Purchase
C.T.
Waukegan, US
★★★★★ 5
Good price air filter
Decent Air filter good price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
M
Verified Purchase
Michelle my Belle
Phoenix, US
★★★★★ 5
Good quality and easy installation.
Fit perfectly. Seemed good quality. Easy installation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2026

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