Manley 11631-8 Valvetrain
* Valve Type: Intake * Head Diameter: 2.000 in. * Stem Diameter:
.3415 in. (11/32) * Installed Height: Stock * Overall Length: 4.900
in. * Tip Length: .250 in. * Underhead Angle/Radius: 12 degrees x
3/8 in. (Pro Flo) * Margin: .050 in. * Seat Width: .080 in. * Top
of Head: 7 degree dish * Weight: 109 grams
The Manley race series performance valve is a great choice for your
bracket oval track or high performance street engine. The valve is
made from NK-842 stainless steel with a chrome stem and hardened
valve tip. This race series valve is made from excellent material
swirl polished and fully machined with an undercut stem for more
flow.
* Measure existing valve head and stem diameter prior to ordering
new valves
Head Diameter: 37.5 mm
Stem Diameter: .2345"
O/A Length: 4.585"
Tip Length: .380"
Underhead Angle/Radius: 25 x 11/32"
Margin: .080"
Seat Width: .100"
Top of Head: 20 Dish
Installed Height: Stock
Weight: 68g
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.
