Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededMANLEYPART NUMBER: 660-11887-1
Severe Duty Exhaust Valve Small Block Chevy
$3764
Ships on 09/29/2026
Lowest Price GuaranteeExhaust Valves1.500'' Valve Diameter 11/32'' Valve Stem Diameter 15° x 1/2'' Underhead Angle/Radius
- Severe Duty Exhaust Valve
- Small Block Chevy
- 1.500'' Diameter
- 11/32'' (0.3415'') Stem Diameter
- 5.036'' Overall Length (+.100)
- 15° x 1/2'' Underhead Angle/Radius
- Stainless Steel
- Super Stock Legal Replacement
- 1/pkg.
- Type: Exhaust Valve XH-428 Material
- Head Diameter: 1.500'
- Stem Diameter: 11/32' / 0.3415'
- Installed Height: +.100' Longer
- Overall Length: 5.036'
- Tip Length: 0.250'
- Underhead Angle / Radius: 15° x 1/2'
- Margin: 0.085'
- Seat Width: 0.085'
- Top of Head: 10° Dish
- Weight / Grams: 94
Part TypeValve
BrandMANLEY
Package Height2.6
Package Width2.6
Package Length7.4
Weight0.25 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part Number11887-1
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
