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Manley Chevy Big Block .250 Longer 11/32in Stem Dia Severe Duty Intake Valves (Set of 8)

Marsoni M251S
Sale price$163.60
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Manley Chevy Big Block .250 Longer 11/32in Stem Dia Severe Duty Intake Valves (Set of 8)Manley 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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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.1 ★★★★★
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mechanic
West Palm Beach, US
★★★★★ 1
It doesn’t work
This don’t work at all. I do not recommend. I use all four containers, and the light is still on.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
A
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Amazon Customer
Waukegan, US
★★★★★ 5
2014 Ford Edge SEL
Worked like a charm! Used as directed, it cleared the P0420 & P0430 codes that were coming up on my OBD II scanner after a complete engine swap. Definitely recommend this product.
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Reviewed in the United States on May 23, 2026
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vance
Port Orchard, US
★★★★★ 4
Good parts
They fit
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Reviewed in the United States on May 5, 2026
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Fabian Medina
Phoenix, US
★★★★★ 5
Todo perfecto 10/10
Todo muy bien 10/10 exelente.
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Reviewed in the United States on March 21, 2026
T
Verified Purchase
Toy4u
Charlottesville, US
★★★★★ 5
N54 engine — it fit absolutely perfectly.
N54 engine — it fit absolutely perfectly.
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Reviewed in the United States on March 17, 2026

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