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Vehicle Info NeededMANLEYPART NUMBER: 660-12856-8
Severe Duty Intake Valves Big Block Chevy
$31148
Ships on 09/09/2026
Lowest Price GuaranteeIntake Valves2.250'' Valve Diameter 5/16'' Valve Stem Diameter
- Severe Duty Intake Valves
- Big Block Chevy
- 2.250'' Diameter
- 5/16'' (0.3110'') Stem Diameter
- 5.494'' Overall Length (+.250)
- Stainless Steel
- 8/pkg.
Installation Note: These 5/16' (.311') stem valves are ONLY available with Bead Loc keeper grooves. Bead Loc valve locks are REQUIRED.
- Type: Intake Valve NK-844 Material
- Head Diameter: 2.250'
- Stem Diameter: 5/16' / 0.3110'
- Installed Height: +.250' Longer
- Overall Length: 5.494'
- Tip Length: 0.250'
- Underhead Angle / Radius: 10° x 3/8'
- Margin: 0.050'
- Seat Width: 0.080'
- Top of Head: 5° Dish
- Weight / Grams: 128
Part TypeValve
BrandMANLEY
Package Height2.6
Package Width6.4
Package Length11.8
Weight2.65 PG
Vendor Part Number12856-8
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
