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Manley Performance Series Chevy Small Block Intake Valve – 2.020 in. Head Dia., 4.880 in. O/A Length, 0.3415 in. Stem

Your Price: $9.04

SKU: 10650-1

In Stock

Manley Valve – Intake, Valve-SBC B/R 2.020.

Manley’s Performance Series valves are engineered to meet the demands of enthusiasts seeking top-tier performance.

  • Premium Stainless Steel: The Performance Series valves are available as XH-422 for exhaust and NK-840 for intake, constructed from high-quality stainless steel for optimal performance.
  • Chrome Stems and Hard Tips: These valves boast chrome stems and hard tips, ensuring exceptional durability, even under extreme conditions.
  • Swirl Polished and Fully Machined: The under head areas are expertly swirl polished, and the combustion faces are fully machined, optimizing airflow and combustion efficiency for maximum power.
  • Variety of Lengths: Tailor your valve selection to your engine’s needs with options for stock length or .100” longer lengths.
SKU: 10650-1 Categories: , ,

GTIN: 00807298047133

Product Market


Head Diameter

2.020 IN

Stem Diameter

0.3415 IN

O/A Length

4.880 IN

Tip Length

0.260 IN

Margin Width

0.060 IN

Seat Width

0.120 IN

Top of Head

Flat Face

Underhead Angle

10.00 DEG

Underhead Radius

3/8 IN

Valve Series

Performance Series

Valve Sub-Series

Budget Replacement

Product Type

Engine Intake Valve

Valve Quantity


Engine Detail – Web

Small Block

Instructions: Enter a value in the un-shaded boxes below as they pertain to your engine.
Note: For pistons BELOW the block @ TDC – value in box must be a POSITIVE number (.000)
Note: For pistons ABOVE the block @ TDC – value in box must be a NEGATIVE number (-.000)
Note: For a DISH piston – value in box must be a POSITIVE number (0.0)
Note: For a DOME piston – value in box must be a NEGATIVE number (-0.0)
Note: Manipulate the DOME/DISH & PISTON to DECK volumes to get the ratio you want.
Enter the number of cylinders of your engine
Finished bore of your engine
Stroke of your engines crankshaft
Rod Length
Ctr. to Ctr. length of your connecting rods
Gasket Bore
Head Gasket bore diameter
Comp. Gasket
Compressed Head Gasket thickness
Block Deck Height
Center of main bearing bore to top of block
Top Ring Down
Top of 1st ring to top of pistons(FLAT)
Chamber Volume
Cylinder Head chamber volume in CC’s
Dome/Dish Volume
DOME (-) or DISH (+) vol. (theoretical) in CC’s
Piston to Deck
Top of BLOCK to top of piston (FLAT) @ TDC
Click “Calculate” for dimension results.
Total Volume
Cylinder Volume
Total cylinder volume in CC’s =
Clearance Volume
All effective vol. above block deck @ TDC in CC’s =
Gasket Volume
Volume of your head gasket in CC’s =
Top Ring Volume
Total volume above the top ring @ TDC in CC’s =
Deck Volume
Volume of area above the pistons @ TDC in CC’s =
Piston Top Land
Piston top land diameter for volume calculations =
1/2 Stroke
1/2 stroke of your engine’s crankshaft in inches =
Compression Ht.
Ctr. of piston pin to top of piston (FLAT) in inches =
Cubic Inches
Cubic inch displacement of your engine =
For the given dimensions, your compression ratio