Manley Chevy Big Block Stock 3/8 inch Severe Duty Intake Valves (Set of 8)

Save $100.35
Manley PerformanceSKU: man11562-8
Manley Chevy Big Block Stock 3/8 inch Severe Duty Intake Valves (Set of 8)
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Manley Chevy Big Block Stock 3/8 inch Severe Duty Intake Valves (Set of 8)

Manley Chevy Big Block Stock 3/8 inch Severe Duty Intake Valves (Set of 8)

Save $100.35
Manley PerformanceSKU: man11562-8
Price:
$301.07 $401.42
Stock:
In Stock, Direct ship from Manley Performance (38 available)

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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.

  • Swirl polishing and machined faces improved airflow/optimized efficiency
  • Exotic alloys for superior tensile strength, reliability, and longevity
  • Proven fatigue strength for extreme performance
  • Chrome stems and hard tips enhance durability
Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: false
Units Per Sku: 1

Vehicle Fitment

Years Make Model Trim
1965, 1968 Chevrolet Bel Air
1966, 1968 Chevrolet Biscayne
1967, 1972, 1978, 1984, 1990, 1995 Chevrolet C10
1970, 1978, 1988 Chevrolet C20
1972, 1985 Chevrolet C30
1967, 1969, 1971 Chevrolet Camaro
1966, 1970, 1974, 1976 Chevrolet Caprice
1965, 1968, 1970, 1972 Chevrolet Chevelle
1965–1966, 1968, 1970, 1972, 1974 Chevrolet Corvette
1966, 1968, 1970, 1972, 1974 Chevrolet El Camino
1965, 1968, 1970, 1972, 1974, 1976 Chevrolet Impala
1970, 1972, 1974 Chevrolet Monte Carlo
1968–1970 Chevrolet Nova
1970, 1980, 1990 Chevrolet Suburban
1973, 1980, 1988 GMC Sierra
1971, 1973, 1975 GMC Sprint

About Us

We are a group of dedicated car enthusiasts who have a passion for all things automotive.

Our love for cars started at a young age and has only grown stronger over time. We believe that everyone should have the opportunity to experience the thrill and excitement that comes with driving a well-crafted vehicle.

We work on all types of cars. If you're in the area, feel free to stop by and say hi. We love meeting fellow car lovers and spreading our passion to everyone we meet. Don't forget to follow or tag us on social media: Instagram/ Tiktok