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Manley Performance

Manley Chevy LS-6 Head Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)

Manley Chevy LS-6 Head Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)

SKU: MAN11677-8

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Identical new, in-stock parts from authorized U.S. dealers. Delivered prices compared before tax. Matches require approval.
$457.49 USD
$457.49 USD
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Shipping, lead times & import charges

U.S.-stock and overseas-sourced items have different lead times. If this item must ship from Japan or another country, supplier processing, international transit and customs clearance can extend delivery. A shipping service transit estimate does not include supplier lead time. Contact RACECLUB for the current dispatch estimate before ordering time-sensitive or special-order parts.

For shipments crossing a border, customs duties, import taxes and carrier brokerage or handling fees may apply. Charges expressly collected at checkout are shown there; otherwise additional import charges may be payable by the recipient. Foreign manufacture alone does not mean your order will ship internationally. Confirm the shipping origin and any applicable import charges with us before ordering.

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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 1400°F, Manley exhaust valves endured 100 million cycles, while competitors failed after just 100,000, proving a 1,000× longer fatigue life. Each valve features chrome stems, hard tips, and swirl-polished underheads with fully machined combustion faces for superior airflow, efficiency, and wear resistance. Built for those who demand race-winning strength and precision, Manley Severe Duty® Valves set the industry standard for performance and endurance.

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