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Part number: 11133-8
Product Details
Manley 11133-8 Valvetrain
Products specifications
Head Diameter 30.5mm
Margin .065"
O/A Length 109.7mm
Overall Valve Length (in) 4.319 in.
Overall Valve Length (mm) 109.7mm
Quantity Sold as a set of 8.
Seat Width .080"
Stem Diameter 6.54mm/.2575”
Swirl Polished Yes
Swirl-Polished Yes
Tip Length 3.8mm
Top of Head 17° Dish
Undercut Stem Yes
Underhead Angle/Radius Pro Flo: 22° x 7/16"
Valve Head Diameter (in) 1.201 in.
Valve Head Diameter (mm) 30.5mm
Valve Head Style 17 degree dish
Valve Material XH-426 stainless steel
Valve Seat Width (in) 0.080 in.
Valve Stem Diameter (in) 0.257 in.
Valve Stem Diameter (mm) 6.6mm
Valve Tip Length (in) 0.150 in.
Valve Tip Length (mm) 3.80mm
Race Series Valves
Set of 8

Manley Performance Sport Compact 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.

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.

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 or drifting events.

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