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  • Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
Load image into Gallery viewer, Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
Load image into Gallery viewer, Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
Load image into Gallery viewer, Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
Load image into Gallery viewer, Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
Load image into Gallery viewer, Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single

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Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single

Manley Performance
MAN11583-1
Valves
$50.19
$50.19
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Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
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.
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