Manley Dart Big Block Pro 1 Stock Length 11/32in Stem Dia Severe Duty Intake Valves (Set of 8)

Manley Dart Big Block Pro 1 Stock Length 11/32in Stem Dia Severe Duty Intake Valves (Set of 8)

Marsoni

M251S

$163.60

Get it in 3 business days with 1 day shipping. Friday, May 29

Manley Dart Big Block Pro 1 Stock Length 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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WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on April 3, 2026

Verified Purchase

Dannette Steck

Belleville, US

★★★★★ 3

Meh

On the fence if this has helped or not. Haven't really noticed anything and I've given it 2 months. Probably won't order again.

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Reviewed in the United States on March 21, 2026