What makes these valves suitable for high-RPM engines?

These Manley Race Master valves are built with durable stainless steel, chrome-plated stems, and hardened tips to withstand the increased stress and heat of engines operating up to 8000 RPM. The optimized airflow design also contributes to efficient operation at higher speeds.

Are these valves recommended for any specific fuel types?

Yes, these exhaust valves are specifically recommended for alcohol engines. Their robust construction is designed to handle the unique demands and combustion characteristics associated with alcohol fuels.

What are the key dimensions of these exhaust valves?

Each exhaust valve has a head diameter of 1.590 inches, a stem diameter of 0.3136 inches, and an overall length of 4.923 inches. These dimensions are crucial for proper fitment within the cylinder head.

Specifications

Brand: Manley Performance
Part #: 11621-8
UPC: 807298051192

Manley Chevy LS-3/L-99 (L-92 Head) Small Block Race Master Exhaust Valves (Set of 8)

Name: Manley Chevy LS-3/L-99 (L-92 Head) Small Block Race Master Exhaust Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-chevy-ls-3-l-99-l-92-head-small-block-race-master-exha-t14-301531
Price: 235.06 USD
Availability: InStock

$235.06

Only 7 left in stock

Manley Chevy LS-3/L-99 (L-92 Head) Small Block Race Master Exhaust Valves (Set of 8). Well-built stainless steel for high-RPM engines.

Key Features

Fits 2007-2008 Cadillac Escalade, GMC Yukon, and Hummer H2 models.
Set includes 8 exhaust valves for V8 engines.
Constructed from durable stainless steel for longevity.
Chrome-plated stems and hardened tips enhance wear resistance.
Swirl-polished under-head areas and machined combustion faces optimize airflow.
Recommended for alcohol engines and high-RPM applications up to 8000 RPM.

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About this part

Product Details

If you're rebuilding the top end of your Chevy LS-3, L-99, or L-92 head engine, especially for performance applications, new exhaust valves are a critical component. These Manley Race Master exhaust valves are built to handle the stress of engines running up to 8000 RPM, making them a solid option for drag racing, bracket racing, or oval track use. They are also specifically recommended for alcohol-fueled engines, where exhaust valve durability is paramount.

Constructed from high-quality stainless steel, these valves are designed for long life. The stems are chrome-plated for improved wear resistance, and the tips are hardened. Manley also swirl-polished the under-head areas and fully machined the combustion faces. This attention to detail helps optimize airflow into the cylinder and can contribute to better combustion efficiency. This set includes eight valves, which is what you'll need for a typical V8 engine.

These valves fit a range of vehicles, including models like the Cadillac Escalade, GMC Yukon, and Hummer H2 from the 2007-2008 model years. When installing, ensure you follow the manufacturer's guidelines for proper seating and valve guide clearance to get the most out of their performance and longevity.