What is the main benefit of the hollow stem design?

The hollow stem design helps reduce the overall weight of the valve. This can lead to improved valve train stability, especially at higher engine speeds, which is important for racing applications.

Are these valves suitable for all types of racing engines?

These intake valves are specifically designed for racing engines operating under 8000 RPM, such as those used in bracket, drag, and oval track racing. They are built to handle increased airflow demands in performance applications.

What material are the valves made from and why is it important?

The valves are made from high-quality stainless steel, which offers excellent durability and resistance to the high temperatures and stresses found in performance engines. The chrome stems and hard tips further enhance wear resistance for longer service life.

Specifications

Brand: Manley Performance
Part #: 11666H-8
UPC: 807298004952

Manley 2.020 Triple Groove Race Flo Hollow Stem Intake Valves for 03-08 5.7L Gen III Hemi - Set of 8

Name: Manley 2.020 Triple Groove Race Flo Hollow Stem Intake Valves for 03-08 5.7L Gen III Hemi - Set of 8
Brand: Manley Performance
SKU: manley-performance-manley-2-020-triple-groove-race-flo-hollow-stem-intake-valves-t14-566955
Price: 654.89 USD
Availability: BackOrder

$654.89

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley 2.020" Race Flo Hollow Stem Intake Valves for 03-08 5.7L Gen III Hemi - Set of 8. Improve airflow for high-performance engines.

Key Features

Fits 2003-2008 5.7L Gen III Hemi engines.
Set includes 8 intake valves.
Constructed from high-quality stainless steel for durability.
Chrome stems and hard tips enhance longevity and wear resistance.
Swirl-polished under-head areas and fully machined combustion faces optimize airflow.
Hollow stem design reduces valve weight for improved valve train stability.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

If you're rebuilding the top end of your 2003-2008 5.7L Gen III Hemi engine for serious racing, these Manley Race Flo intake valves are a solid choice. They're designed to handle the increased airflow demands that come with performance camshafts and tuning, especially in engines operating under 8000 RPM. Getting the right valves means ensuring your engine breathes efficiently, which is crucial for making power on the drag strip or oval track.

These valves are constructed from a high-quality stainless steel that's built for durability, even under the stress of racing. The stems are chrome-plated and feature hard tips, which helps them stand up to wear over time. Manley also swirl polishes the under-head areas and fully machines the combustion faces. This attention to detail helps optimize airflow into the combustion chamber, contributing to better performance. The hollow stem design also helps reduce overall valve weight, which can be beneficial for valve train stability at higher RPMs.

This set includes eight intake valves, enough for a complete V8 engine. While these are intake valves, Manley notes that their similar stainless steel exhaust valves are recommended for alcohol engines due to their robust construction. If you're aiming for maximum performance from your Gen III Hemi, these valves are a key component to consider for your build.