Manley Exhaust Valve 11677-1; Severe Duty 0.175 in. 0.314 in. 1.600 in. for Chevy LS

$35.84

Part #: 11677-1

Brand: Manley

UPC: 807298062969

Estimated Ship Date: Discontinued

Specifications Alternative Parts

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Details

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust valves, tested at 40,000 psi and 1400?F, impressively endured up to 100,000,000 (one hundred million) cycles. In contrast, competitors' offerings failed after just 100,000 cycles, showcasing a staggering 1000 times better fatigue life.
Designed for High Temperature Gasoline Engines: Engineered for superior performance in high-temperature gasoline engines.
Chrome Stems and Hard Tips: Incorporating chrome stems and hard tips for enhanced durability and longevity.
Optimized Combustion: Swirl polished under head areas and fully machined combustion faces for improved airflow and combustion efficiency.
XH-428 for Exhaust: No competitor worldwide offers the exceptional XH-428 as exhaust valve material. It boasts nearly double the ultimate tensile strength at 1500?F compared to the competition's EV-8.

Product Description

Discover the pinnacle of performance and racing excellence with Manley's Severe Duty? Valves. Exhaust valves crafted from XH-428 material and Intake valves from NK-844 material, these valves stand as a testament to our unwavering commitment to superiority in the industry. Severe Duty? Valves outshine the competition in every aspect.

Specifications

Exhaust Valve Series:
Severe Duty: Make:
Chevy: Engine:
LS: Head Diameter:
1.600 in.: Length:
4.923 in.: Valve Stem Diameter:
0.314 in.: Valve Tip Length:
0.175 in.: Material:
Stainless Steel: Underhead Angle:
25 deg.: Underhead Radius:
7/16 in.: Margin:
0.065 in.: Seat Width:
0.115 in.: Seat Angle:
45 deg.: Dish Angle:
18 deg.: Quantity:
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Alternative Parts

Manley Exhaust Valve Set 11677-8; Severe Duty 0.175 in. 0.314 in. 1.600 in. for Chevy LS

MAN11677-8

$286.72

Estimated Ship Date: Please Call