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Part number: 11390H-8
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Product Details
Manley 11390H-8 Valvetrain
Products specifications
Approximate Weight (g) 94
Lock Groove Quantity 1-groove
Lock Groove Style Conventional
Notes Hollow valve stem.
Overall Valve Length (in) 4.874 in.
Overall Valve Length (mm) 123.8mm
Quantity Sold as a set of 8.
Swirl Polished Yes
Swirl-Polished Yes
Undercut Stem Yes
Valve Head Diameter (in) 2.055 in.
Valve Head Diameter (mm) 52.2mm
Valve Head Style 7 degree dish
Valve Material NK-842 stainless steel
Valve Seat Width (in) 0.095 in.
Valve Stem Diameter (in) 0.313 in.
Valve Stem Diameter (mm) 8.0mm
Valve Tip Length (in) 0.175 in.
Valve Tip Length (mm) 4.45mm
Head Diameter: 2.055"
Stem Diameter: .3133"
O/A Length: 4.874"
Tip Length: .175"
Underhead Angle/Radius: Pro Flo 12 x 3/8"
Margin: .050"
Seat Width: .095"
Top of Head: 7 Dish
Installed Height: Stock
Weight: 94g

Manley Performance has been manufacturing the finest stainless steel valves for over 40 years. Manley valves have been the standard of the industry since their inception; a fact that still remains true today as weve entered into new markets.

Manley Performance Chevy LS, Ford Modular, and Chrysler SB HEMI stainless steel valves utilize our exceptional Race Series alloy and are manufactured to the highest quality standards.

Manley valves are designed to outflow and outperform all others even in the most severe environments. Manley stainless valves feature gorgeous yet durable chrome stems, swirl polished under heads, fully hardened tips, completely machined combustion faces, closely controlled margin heights, and exact stem to seat concentricity to render a finished product that is unsurpassed.

Manley intake valves typically are built with our original Pro-Flo design which reduces the stem diameter in the fillet area for increased airflow but also less valve weight. This concept is executed on our Chevy LS and Chrysler HEMI parts.

In certain specific applications, Manley offers our Extreme Duty exhaust material. Our Extremealloy alloy offers more hot hardness and high temperature strength than our competitors offerings. This alloy is ideal for extremely high boosted applications where the exhaust gas temperatures reach what seem like unthinkable levels. In the case of the Ford Modular 4.6L and 5.4L 3 valve cylinder head engine, we chose to use Extremealloy.

Manley stainless valves are suitable for all applications ranging from the mild street performer to the jaw dropping 1000+ horsepower race cars competing at the drag strip.

Manley has been at the forefront with these niche markets; developing better flowing and stronger aftermarket valves for the Chevy LS and Ford Modular market before our competition. We were the first to offer L-92 valves and our hollow LS valves are the very best in the industry.

Reviews
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A
First of all, I can not believe how fast I recieved my order, 2 DAYS! Best of all, the instructions made it easy for a non mechanic like me to install.
M
Fast shipping and the lowest price. Very impressed.
R
fast shipment and was exactly what i had ordered
S
I didn't get a shipping notice until three days after I got the product. It was exactly what I ordered and did arrive during the proper time frame
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Fitment
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