Manley Intake Valve Set 11686H-8; Pro Flo Hollow Stem 0.160 in. 0.313 in. 2.165 in. for Chevy LS3, L99 with L92 Heads

$661.13

Part #: 11686H-8

Brand: Manley

UPC: 807298042893

Estimated Ship Date: Please Call

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

Intake Valve Set Series:
Pro Flo Hollow Stem: Make:
Chevy: Engine:
LS3, L99 with L92 Heads: Head Diameter:
2.165 in.: Length:
4.900 in.: Valve Stem Diameter:
0.313 in.: Valve Tip Length:
0.160 in.: Underhead Angle:
Pro Flo 12 deg.: Underhead Radius:
3/8 in.: Margin:
0.055 in.: Seat Width:
0.100 in.: Seat Angle:
45 deg.: Dish Angle:
7 deg.: Quantity:
Sold As Set (8/pkg)

Alternative Parts

Manley Intake Valve 11686H-1; Pro Flo Hollow Stem 0.160 in. 0.313 in. 2.165 in. for Chevy LS3, L99 with L92 Heads

MAN11686H-1

$82.64

Estimated Ship Date: Discontinued