Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededMANLEYPART NUMBER: 660-12780-1
Severe Duty Intake Valve Big Block Chevy
$3893
Ships on 09/09/2026
Lowest Price GuaranteeIntake Valves2.300'' Valve Diameter 5/16'' Valve Stem Diameter
- Severe Duty Intake Valve
- Big Block Chevy
- 2.300'' Diameter
- 5/16'' (0.3110'') Stem Diameter
- 5.244'' Overall Length (Stock)
- Stainless Steel
- 1/pkg.
- Type: Intake Valve NK-844 Material
- Head Diameter: 2.300'
- Stem Diameter: 5/16' / 0.3110'
- Installed Height: Stock
- Overall Length: 5.244'
- 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: 126
Part TypeValve
BrandMANLEY
Package Height2.5
Package Width2.5
Package Length7.0
Weight1.0 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part Number12780-1
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![Valve Spring Compressor [Stud Mount]](https://www.jegs.com/images/mini_200/500/555/555-80518.jpg)
![Valve Spring Compressor [Stud Mount]](https://www.jegs.com/images/mini_200/500/555/555-80521.jpg)
Some parts are not legal for use in California or other states with similar laws / regulations
