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Vehicle Info NeededMANLEYPART NUMBER: 660-11509-1
Race Master Exhaust Valve Big Block Chevy
$2358
Ships on 09/29/2026
Lowest Price GuaranteeExhaust Valves3/8'' Valve Stem Diameter
- Race Master Exhaust Valve
- Big Block Chevy
- 1.880'' Diameter (9° dish head)
- 3/8'' (0.3715'') Stem Diameter
- 5.422'' Overall Length (Stock)
- Stainless Steel
- 1/pkg.
- Type: Exhaust Valve XH-426 Material
- Head Diameter: 1.880'
- Stem Diameter: 3/8' / 0.3715'
- Installed Height: Stock
- Overall Length: 5.422'
- Tip Length: 0.250'
- Underhead Angle / Radius: 15° x 1/2'
- Margin: 0.075'
- Seat Width: 0.100'
- Top of Head: 9° Dish
- Weight / Grams: 139
Part TypeValve
BrandMANLEY
Package Height2.4
Package Width2.8
Package Length7.1
Weight0.39 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part Number11509-1
Package Qty1
Package TypeEA
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