



COMP Cams Valve Seals 5/16in PTFE
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
COMP Cams Valve Seals 5/16in PTFEFits: 5 16" Valve Stems . 530" Guides (. 630" Outer Diameter)Valves Seals keep unwanted oil from entering the combustion chamber through clearance in the valve guidesSmaller diameter than COMP Umbrella Seals to allow use with double springs Catalog User 1 This Part Fits: Year Make Model Submodel 1970 1971 Dodge Challenger Base 1970 1971 Dodge Challenger R T 1969 1971 Dodge Charger 500 1966 1971 Dodge Charger Base 1969 Dodge Charger Daytona 1967 1971
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4.1 ★★★★★
Based on 112 reviews
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Product Reviews
★★★★★ 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.
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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.
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Reviewed in the United States on December 3, 2025
★★★★★ 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.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 11, 2015
★★★★★ 5
Product as described, Works great.
Style: Single
Product as described, Works great.
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Reviewed in the United States on August 27, 2015