How to service and repair the rocker arm assembly on Ford Mustang?

Start by removing the valve cover before you can remove the rocker arm assembly with its bolt uninstallation. The rocker arm bolts need stage-wise tightening to 5 Nm (44 inch lbs.) first then reaching 35 Nm (26 ft. lbs.). Finally, reinstall the valve cover. When working on several rocker arms always record their positions for proper reinstallation.

How to Address Issues with the Rocker Arm in a Ford Mustang?

Start the rocker arm assembly servicing process by eliminating valve covers and after that extract the assembly by removing its bolt. Multiple rocker arm removal requires the use of component marks that will help with proper reinstallation order. The installation process requires mounting of rocker arms before tightening the bolts through two stages where you should first tighten to 5 Nm (44-inch lbs.) followed by a second stage at 35 Nm (26 ft. lbs.). Finally, reinstall the valve covers.

OEM Ford Mustang Rocker Arm

Engine Rocker Arm

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11 Rocker Arms found

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Ford Mustang Rocker Arms Part Number: 3L3Z-6564-A
$24.09 MSRP: $34.17
You Save: $10.08 (30%)
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Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm
- Replaces: 3L3Z-6564-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2010 Ford Mustang | Bullitt, GT, Shelby GT | 8 Cyl 4.6 L GAS
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Ford Mustang Rocker Arms Part Number: EOAZ-6564-B
$16.37 MSRP: $23.83
You Save: $7.46 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm
- Manufacturer Note: exc. "Cobra"
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1994-1995 Ford Mustang | GT | 8 Cyl 5.0 L GAS
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Ford Mustang Rocker Arms Part Number: BR3Z-6564-A
$18.89 MSRP: $27.50
You Save: $8.61 (32%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm
- Manufacturer Note: Includes Retaining Clip
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2017 Ford Mustang | Boss 302, GT, GT 50 Years Limited Edition, GT Premium, Shelby GT350, Shelby GT350R | 8 Cyl 5.0 L GAS, 8 Cyl 5.2 L GAS
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Ford Mustang Rocker Arms Part Number: YL2Z-6564-AA
$20.91 MSRP: $30.43
You Save: $9.52 (32%)
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Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm
- Replaces: F77Z-6564-AB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2007 Ford Mustang | Base | 6 Cyl 4.0 L GAS
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Ford Mustang Rocker Arms Part Number: F8AZ-6564-AA
$22.30 MSRP: $32.47
You Save: $10.17 (32%)
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Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm
- Replaces: F2AZ-6564-A, F6AZ-6564-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1996-2004 Ford Mustang | GT, GT Bullitt, Mach 1, SVT Cobra, SVT Cobra 10th Anniversary | 8 Cyl 4.6 L GAS
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Ford Mustang Rocker Arms Part Number: 4G7Z-6564-AA
$30.23 MSRP: $44.00
You Save: $13.77 (32%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm
- Manufacturer Note: For Non-Spraybar Oiling Style Cylinder Heads
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007-2014 Ford Mustang | Base, Shelby GT500, Shelby GT500KR | 6 Cyl 4.0 L GAS, 8 Cyl 5.4 L GAS, 8 Cyl 5.8 L GAS
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Ford Mustang Head Gasket Part Number: FOSZ-6564-A
$23.42 MSRP: $31.87
You Save: $8.45 (27%)
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Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm; Rocker Arms; Alternator
- Replaced by: E9SZ-6564-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1984-1986 Ford Mustang | GT, L, LX | 6 Cyl 3.8 L GAS, 8 Cyl 5.0 L GAS
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Ford Mustang Rocker Arms Part Number: HL3Z-6564-D
$29.73 MSRP: $42.17
You Save: $12.44 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2022 Ford Mustang | Shelby GT500 | 8 Cyl 5.2 L GAS
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Ford Mustang Rocker Arms Part Number: ML3Z-6564-A
$16.95 MSRP: $24.67
You Save: $7.72 (32%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm
- Replaces: ML3Z-6564-G
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2023 Ford Mustang | Bullitt, GT, GT Premium, Mach 1 | 8 Cyl 5.0 L GAS
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Ford Mustang Rocker Arms Part Number: GR3Z-6564-BA
$32.05 MSRP: $45.47
You Save: $13.42 (30%)
ADD TO CART
Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm
- Replaces: GR3Z-6564-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2020 Ford Mustang | Shelby GT350, Shelby GT350R | 8 Cyl 5.2 L GAS
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Ford Mustang Rocker Arms Part Number: E9SZ-6564-A
$23.42 MSRP: $31.87
You Save: $8.45 (27%)
ADD TO CART
Product Specifications
- Other Name: Arm Assembly - Valve Rocker; Rocker Arm
- Replaces: FOSZ-6564-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1994-2004 Ford Mustang | Base | 6 Cyl 3.8 L GAS, 6 Cyl 3.9 L GAS

Ford Mustang Rocker Arm

OEM Rocker Arm boasts unmatched quality. Each part goes through full quality checks. They adhere to Ford's official factory standards. These steps remove flaws and inconsistencies. So you can get Rocker Arm with long life and a perfect fit. Come to our website and find genuine Ford Mustang parts. We keep a wide inventory of OEM Mustang parts at the highly affordable prices. It's easy to search, compare, and pick what you need. You'll love the clear info and simple checkout. We offer top-rated customer service, and we reply fast. We also ship promptly to ensure your order arrives on time.

Ford Mustang automobiles have the Rocker Arm as part of the valvetrain system whose primary function is to relay motion from the pushrod to the intake and the exhaust valves. Usually made of stamped steel or aluminum, the Rocker Arm changes the attitude of the pushrod and applies the required amount of force to the valves. In high RPM applications aluminum is more common for its lightweight nature whereas cast iron or forged carbon steel is more common in diesel engines. Various types of Rocker Arms, as the roller rockers incorporate needle bearings intending to decrease friction and general wear as opposed to a conventional Rocker Arm design. The rocker ratio is found in today's Ford Mustang engines with varying between 1.5:1 and 1.8:1, amplifies the camshaft lift to increase performance. The revised fulcrum bearings are also used to handle stresses and prolong durability in high RPM Mustangs, another evolution of the Rocker Arm in these legendary vehicles.

Ford Mustang Rocker Arm Parts and Q&A

Rocker Arms
F8AZ-6564-AA
Q: How to service and repair the rocker arm assembly on Ford Mustang?
A:
Start by removing the valve cover before you can remove the rocker arm assembly with its bolt uninstallation. The rocker arm bolts need stage-wise tightening to 5 Nm (44 inch lbs.) first then reaching 35 Nm (26 ft. lbs.). Finally, reinstall the valve cover. When working on several rocker arms always record their positions for proper reinstallation.
Rocker Arms
E9SZ-6564-A
Q: How to Address Issues with the Rocker Arm in a Ford Mustang?
A:
Start the rocker arm assembly servicing process by eliminating valve covers and after that extract the assembly by removing its bolt. Multiple rocker arm removal requires the use of component marks that will help with proper reinstallation order. The installation process requires mounting of rocker arms before tightening the bolts through two stages where you should first tighten to 5 Nm (44-inch lbs.) followed by a second stage at 35 Nm (26 ft. lbs.). Finally, reinstall the valve covers.