Manley Extreme Duty Stainless Steel - Exhaust Valves (EJ20, EJ25)

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Manley EJ20/25 Extreme SS Valves

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.

Specifications

Head Diameter: 32mm or 33mm
Stem Diameter: 5.96mm/.2345"
Installed Height: Stock
O/A Length: 104.75 mm
Tip Length: 3.5 mm
Underhead Angle/Radius: 25° x 11/32"
Margin: .060
Seat Width: .080"
Top of Head: 20° Dish

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Details

Fitment

EJ205
EJ255
EJ257

Note: Manley Performance strongly recommends that customers check their valve guide size in order to achieve the proper valve stem to guide clearance. Guides may need to be honed when replacing stock factory valve.

WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to https://www.P65Warnings.ca.gov/passenger-vehicle.

More Information

More Information
SKU	Manley EJ20/25 Extreme SS Valves
Manufacturer's Part Number	11155-8
Brand	Manley
Product Type	Engine
Engine	Cylinder Heads and Valvetrain