Manley Severe Duty Series Stainless Steel Valves 12850-8

Name: Manley Severe Duty Series Stainless Steel Valves
Brand: Manley
SKU: MAN-12850-8
Price: 311.48 USD
Availability: InStock
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Part Number: MAN-12850-8

$311.48

Manley Severe Duty Series Stainless Steel Valves

Valve, Intake, Stainless Steel, 2.250 in. Head Diameter, 5.344 in. Length, Chevy, Big Block, Set of 8
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Manley Severe Duty Series Stainless Steel Valves 12850-8

MAN-12850-8

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Part Number: MAN-12850-8

Estimated Ship Date: Oct 26, 2026

$311.48

Overview

Applications

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Overview

Brand:

Manley

Manufacturer's Part Number:

12850-8

Part Type:

Valves

Product Line:

Manley Severe Duty Series Stainless Steel Valves

Summit Racing Part Number:

MAN-12850-8

UPC:

807298005805

Valve Position:

Intake

Intake Valve Head Diameter (in.):

2.250 in.

Intake Valve Head Diameter (mm):

57.200 mm

Intake Valve Stem Diameter (in.):

0.311 in.

Intake Valve Stem Diameter (mm):

7.90mm

Intake Overall Valve Length (in.):

5.344 in.

Intake Overall Valve Length (mm):

135.700mm

Undercut Stem:

Swirl-Polished:

Yes

Valve Tip Length (in.):

0.250 in.

Valve Tip Length (mm):

6.350mm

Valve Material:

Stainless steel

Lock Groove Quantity:

1-groove

Lock Groove Style:

Beadlock

Approximate Weight (g):

125

Valve Head Style:

5 degree dish

Valve Seat Width (in.):

0.080 in.

Quantity:

Sold as a set of 8.

Notes:

Under head angle/radius 10 x 3/8 in.

Manley Severe Duty Series Stainless Steel Valves

Manley Severe Duty series performance valves are a great choice for your high performance or race engine. All valves are made from stainless steel (intakes are NK-844; exhausts are XH-428) with chrome stems and hardened valve tips. Severe Duty series valves are made of superior materials, are fully machined and swirl polished, and are available with either undercut "Pro Flo" stems or straight stems.

Applications