Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
SKU 11583-1
MPN man11583-1
$50.18 · Available to order
Manley Chevrolet Big Block 1.940in Head Dia. / 6.400in OAL / 0.3415in Stem / Exhaust Valve - Single
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.
| Category | Engine Components |
|---|---|
| Sub-Category | Valves |
| CARB Approved | Yes |
| Special Order | Yes |
| Weight | 1 lb |
| Dimensions (L×W×H) | 5 × 3 × 3 in |