Name: Manley SBC 1.6 Severe Duty Exhaust Valves (Set of 8)
Brand: Manley Performance
SKU: MAN11595-8
Price: 286.72 USD

Manley SBC 1.6 Severe Duty Exhaust Valves (Set of 8)

Manley Performance
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Manley SBC 1.6 Severe Duty Exhaust Valves (Set of 8)

Manley Performance
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SKU: MAN11595-8
Barcode: 807298050904

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000... Read more

Out of stock, 1-3 weeks

$382.30 $286.72

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Shipped today? Order within: Jul 17, 2026 16:00:00 -0400

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Description

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.NK-844 for Intake: Our intake valve material, NK-844, is equally unmatched, displaying over four times the ultimate tensile strength of the competition's best intake valve material at 1000?F.

Specifications

Type: Aftermarket
Usage: Street Use & Speedway

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Orders may be returned or exchanged within 15 days of receiving the parcel, provided the items are in their original, resalable condition. Customers are responsible for return shipping costs unless the return is due to an error made by Gearhead Motoring, in which case we will cover all shipping costs. Please wait for an RMA number and return instructions before sending any item back. Items returned without an RMA will not be accepted.

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Contact Gearhead Motoring as soon as possible and submit a damage claim at shipping@gearheadmotoring.com
Keep all original packaging materials, including the box and packing materials.
Make a list of any damaged or missing items.
Take clear photos of the damaged packaging and the affected products.
If the delivery driver cannot wait for an inspection, or does not allow you to inspect the shipment, write "SUBJECT TO INSPECTION" on the delivery receipt before signing and ask the driver to acknowledge it.

Once we receive the required information, Gearhead Motoring will work directly with the shipping carrier and arrange a pickup if necessary. Do not return any merchandise without prior written authorization and an RMA number from Gearhead Motoring.

After the returned product is received and inspected, we will notify you whether the item will be replaced, or if a refund or store credit will be issued.

Important: By signing and accepting a freight shipment, you may waive your right to file a damage claim for any damage not noted on the delivery receipt. We strongly recommend inspecting all freight shipments upon arrival, even if the outer packaging appears to be in good condition.