Manley Valve - Intake, Valve-S/D 2.125,+.500 11508-8

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Specifications:

BrandManley
Part Number11508-8
GTIN00807298049205
EngineSmall Block
Engine TypeIce
Engine Valve Quantity8
Head Diameter2.125 in
MakeChevrolet
Margin Width0.065 in
O/a Length5.440 in
Product TypeEngine Intake Valve Kit
Seat Width0.080 in
Stem Diameter0.3415 in
Tip Length0.290 in
Top Of Head7 Degree Dish
Underhead Angle12.00 degrees
Underhead Radius3/8
Valve Head Diameter2.125 in
Valve Head Shape7 Degree Dish
Valve Length5.440 in
Valve MaterialStainless Steel
Valve Quantity8
Valve SeriesSevere Duty? Series
Valve Stem Diameter0.3415 in
Valve Tip Length0.290 in
Valve TypeIntake

Specifications:

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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