


Manley Severe Duty Series BBC Stainless Steel Exhaust Valves 2.250in Dia 5.344in L - Set of 8
Marsoni
M251S
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Friday, May 29
Manley Severe Duty Series BBC Stainless Steel Exhaust Valves 2.250in Dia 5.344in L - Set of 8Manley Severe Duty Valves deliver the ultimate in strength, reliability, and high performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH 428 for exhaust and NK 844 for intake), offering unmatched tensile strength compared to competitive alloys. In fatigue testing at 40,000 psi and 1400F, Manley exhaust valves endured 100 million cycles, while competitors failed after just
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★★★★★ 5
Works
Fit my 1996 xr6 150 just fine. Engine runs at correct temperature so they are working as they should.
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Reviewed in the United States on March 13, 2026
★★★★★ 5
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Fit like they should and seems to be working great
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Reviewed in the United States on March 15, 2026
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Reviewed in the United States on December 30, 2025
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Fit Mercury 150 saltwater 2 stroke great!
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Reviewed in the United States on August 26, 2025
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Work’s okay
They work ok, as expected
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