moog-rk8123 | Front Lower Control Arm | 1968-1973 Ford Mustang | MOOG

  • moog-rk8123 360image 1
  • moog-rk8123 Front Lower Control Arm And Ball Joint
  • moog-rk8123 Front Lower Control Arm And Ball Joint
  • moog-rk8123 Front Lower Control Arm And Ball Joint
  • moog-rk8123 Front Lower Control Arm And Ball Joint
  • moog-rk8123 360image large 1

Front Lower Control Arm And Ball Joint

Manufacturer: MOOG
Part Number: moog-rk8123
Price: $45.12

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Suggested part for moog-rk8123: moog-rk621369
moog-rk621369 Front Upper Control Arm and Ball Joint
Go ahead and replace your front upper control arm using Moog's value-driven arm with pre-installed OE style bushings.

  • Moog fulfills their warranty through their individual dealers. That means that in order to receive warranty support, you will have to refer back to the original dealer you purchased the part from. Be sure to check the dealer's warranty support before you buy the part to make sure that they will properly support the warranty. If a dealer will only refer you back to the manufacturer in order to receive warranty support, then you may not actually have any warranty at all.


    Moog Premium Steering Components carry a Limited Lifetime Warranty. Moog R-Series Control Arms, Hub Assemblies, and Strut Assemblies carry a 3 Year Warranty.

    Moog warranties their parts to be free of defects in materials and/or workmanship during these timeframes as measured from the date of purchase.

    If a Moog part should fail due to materials or manufacturing defect while under warranty, we will provide a replacement of the part upon return of the defective part.

    Wearable RUBBER parts are not covered under warranty (Dust boots, bushings, bump stops, etc.)

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FitmentFront Lower Control Arm And Ball Joint moog-rk8123 fits these vehicles:

moog-rk8123 | Front Lower Control Arm | 1968-1973 Ford Mustang | MOOG

1968-1969 Ford Fairlane
  • Fits submodels: 500 and Base
1970-1971 Mercury Cyclone
  • Doesn't fit police or taxi packages
1968-1969 Mercury Montego
  • Fits submodels: Base and MX
1970 Mercury Montego
  • Fits submodels: Base, MX, and MX Brougham
1971 Mercury Montego
  • Fits submodels: Base, MX, MX Brougham, and Villager

What is the Difference Between Moog R Series and CK Control Arms?

CK, K or RK? We here at Diverse Suspension Technologies get this question a whole lot. If you are putting parts on your vehicle, you want to know exactly what you are installing. It can be hard to do that with all of these letter designations. So here is all that you need to know to clear up the confusion.

Short Answer: R Series is a value-driven replacement part while the CK Series incorporates Moog's premium Problem Solver components for a better than OE upgrade.

Moog Stamped Arms
Moog Stamped Arms

CK (K): Moog Problem Solver

Starting with the CK and K. Whether you see a "K" designation or a "CK" designation, you are getting the same part. The CK and K are Moogs Premium line of control arms. Utilizing their "problem solver" technology, these control arms address common factory design issues providing a better than the original replacement for your vehicle. Most CK and K control arms include ball joints that are powder coated metal with gusher bearings giving them a long life. Many of these ball joints are serviceable and have grease fittings. The CK and K arms also have problem solver bushings and a precise fit and form for easy installation.

RK: Moog R Series

The RK series is a more value-driven part. Because there are so many different vehicles both foreign and domestic, Moog has introduced the R-Series arms to provide replacements for a wide range of vehicles. The RK arms have OE fit and form geometry alignment, with pre-installed OE style bushings and most include the ball joints. However, these ball joints are not serviceable like the CK arms. All of the R Series arms have Moog validated construction and design, providing a less expensive alternative.

Moog Forged Arms
Moog Stamped Arms

Type and Warranty

Each line of control arms has Forged Steel, Stamped Steel, or Forged Aluminium arms to provide the best style for your specific vehicle. The Premium CK line has a limited lifetime warranty, and the RK has a 3 year warranty that are both handled through our awesome customer service team at DST. Whether you are looking for a "light on the wallet" OE replacement, or a "premium" control arm upgrade, Moog control arms are a great choice for your vehicle.

Fitment for moog-rk8123
MakeModelYear RangePositionDrive WheelQuantity RequiredEngine BaseEngine VINEngine Designation
FordFairlane1970-1968Front Lower Quantity 2
FordFalcon1970-1968Front Lower Quantity 2
FordGranada1980-1975Front Lower Quantity 2
FordMaverick1977-1970Front Lower Quantity 2
FordMustang1973-1968Front Lower Quantity 2
FordRanchero1971-1968Front Lower Quantity 2
FordTorino1971-1968Front Lower Quantity 2
MercuryComet1977-1968Front Lower Quantity 2
MercuryCougar1973-1968Front Lower Quantity 2
MercuryCyclone1971-1968Front Lower Quantity 2
MercuryMonarch1980-1975Front Lower Quantity 2
MercuryMontego1971-1968Front Lower Quantity 2

question_answer Customer Questions and Answers

Regarding your Rk8123 lower control arm. Can you get a Ck version of that arm?
Moog does not make a Ck lower or upper control arm for your Mustang. Only the RK series.

Is this for both left and right front?
Yes moog-rk8123 will fit the left or right side.

Are the lower control arms ambidextrous (fit either side of the vehicle)?
Yes moog-rk8123 will fit the left and right side.

What is the difference between this item and part # part number: moog-ck8123?
The rk series control arms are the value line of Moog control arms. They have a 3 year warranty, the ball joint may or may not be greaseable. The ck series has a limited lifetime warranty, the ball joint is greaseable and the control arm bushings are e a a better quality. ...see more