Manley Performance 12347-8 Manley Chevy LT-1 6.2L 1.590in Head Diameter Pro Flo/Severe Duty Exhau – EuroPartShop
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  • Manley Chevy LT-1 6.2L 1.590in Head Diameter Pro Flo/Severe Duty Exhaust Valves (Set of 8)
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Manley Performance 12347-8
Manley Chevy LT-1 6.2L 1.590in Head Diameter Pro Flo/Severe Duty Exhaust Valves (Set of 8)

Free Ground Shipping to USA (Lower 48)

2 sold in last 8 days
Manley Performance
12347-8
MAN12347-8
In stock
Valves
$401.42 $306.01
4 interest-free payments or as low as $76.50/mo with Shop Pay 4 installments. Prequalify now
Manley Performance - 12347-8 Valves
Manley Severe Duty® Valves deliver the ultimate in strength, reliability,...
$306.01
Shop Pay 4 installments
Free Gound Shipping to Continental USA
Manley Chevrolet LT1 6.2L 2.120in Head Diameter Race Flo Intake Valves (Set of 8)
Manley Chevrolet LT1 6.2L 2.120in Head Diameter Race Flo Intake Valves (Set of 8)
$251.58 $197.22
Manley Chevrolet LT1 6.2L 1.590in Head Diameter Race Master Exhaust Valves (Set of 8)
Manley Chevrolet LT1 6.2L 1.590in Head Diameter Race Master Exhaust Valves (Set of 8)
$251.58 $197.22
Description

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
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