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Ford Racing Half Shaft Assembly Right Side (2015-2023 Mustang) M-4138-MA

Ford Racing Half Shaft Assembly Right Side (2015-2023 Mustang) M-4138-MA

Best price now

$1,287.50at Lethal PerformanceChecked 10 h ago

Compared across 19 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Best price today: $1,287.50 at Lethal Performance (checked Nov 13, 2026).
  • Checked at 19 stores.

Our take on the Ford Racing Half Shaft Assembly Right Side (2015-2023 Mustang) M-4138-MA

This is Ford Racing's right-side half shaft assembly for 2015-2021 Mustang EcoBoost, GT and GT350 models, built as a direct replacement for the production axle. It uses severe-duty serviceable CV joints with CNC billet centers, aerospace high-alloy steel, and one-piece 34-spline inner and 32-spline outer stub ends. The shaft carries anti-wheel hop technology, which targets the hop that modified Mustangs often show under hard launches. It suits owners pushing more power or drag use; it does not fit the 2020-2021 GT500, and Ford labels it off-road use only.

Best forModified Mustang GT or EcoBoost owners adding powerDrag and track use where wheel hop is a problemReplacing a broken or worn right-side axleBuilders who want serviceable CV joints
Pros
  • Direct replacement for the right-side production half shaft
  • Serviceable severe-duty CV joints with billet centers
  • Billet one-piece splined stub ends
  • Anti-wheel hop design
  • CNC-machined from aerospace high-alloy steel
Cons
  • Right side only; left side sold separately
  • Does not fit 2020-2021 GT500
  • Ford lists it for off-road use only
  • No performance figures published

Ford Racing Half Shaft Assembly Right Side (2015-2023 Mustang) M-4138-MA prices at every store

  • Lethal PerformanceNew

    In stock

    $1,287.50Checked 10 h ago
    Visit Lethal Performance
  • Ford Motor CompanyNew

    In stock

    $1,290.00+ $14.95 shippingChecked 10 h ago
    Visit Ford Motor Company
  • Levittown Ford PartsNew

    In stock

    $1,264.59+ $92.00 shippingChecked 10 h ago
    Visit Levittown Ford Parts
  • GTR AutoNew

    In stockShips from Canada · duties may applyReturn policy

    $1,381.69Checked 10 h ago
    Visit GTR Auto
  • OSS MotorsportNew

    In stockReturn policy

    $1,426.00Checked 10 h ago
    Visit OSS Motorsport
  • Muscle & TrucksNew

    In stockReturn policy

    $1,428.99Checked 10 h ago
    Visit Muscle & Trucks
  • dynosourceperformanceNew

    In stockReturn policy

    $1,440.00Checked 10 h ago
    Visit dynosourceperformance
  • Juggernaut Performance Inc.New

    In stockReturn policy

    $1,440.00Checked 10 h ago
    Visit Juggernaut Performance Inc.
  • Demon PerformanceNew

    In stockReturn policy

    $1,440.00Checked 10 h ago
    Visit Demon Performance
  • SMGspeedNew

    In stockReturn policy

    $1,440.00Checked 10 h ago
    Visit SMGspeed
  • eBayNew

    In stockSold by fordecommerce

    $1,440.00Free shippingChecked 10 h ago
    Visit eBay
  • BTRcarcustomsNew

    In stockReturn policy

    $1,526.39Checked 10 h ago
    Visit BTRcarcustoms
  • Alpha Team Car Customs & CareNew

    In stockReturn policy

    $1,538.99Checked 10 h ago
    Visit Alpha Team Car Customs & Care
  • Texas Speed and PerformanceNew

    Availability unknown

    $1,287.50Checked 10 h ago
    Visit Texas Speed and Performance
  • CJ Pony PartsNew

    Availability unknown

    $1,309.99Checked 10 h ago
    Visit CJ Pony Parts
  • Beefcake RacingNew

    Availability unknown

    $1,440.00Checked 10 h ago
    Visit Beefcake Racing
  • 797 PerformanceNew

    Availability unknown

    $1,440.00Checked 10 h ago
    Visit 797 Performance
  • Madness AutoworksNew

    Availability unknown

    $1,489.99Checked 10 h ago
    Visit Madness Autoworks
  • Fitment IndustriesNew

    Availability unknown

    $1,552.58Checked 10 h ago
    Visit Fitment Industries

Also available at

  • Lethal PerformanceCheck price at Lethal Performance

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Ford Racing Half Shaft Assembly Right Side (2015-2023 Mustang) M-4138-MA price history

Lowest price we've seen: $1,264.59 on Nov 13 at Levittown Ford Parts. Tracked across 10 stores since Nov 13.

About the Ford Racing Half Shaft Assembly Right Side (2015-2023 Mustang) M-4138-MA

This is the right side half shaft assembly for the Ford Mustang. It is a direct replacement for the production right side half shaft. It does not fit the 2020-2021 GT500.

The axle shafts are CNC-machined from aerospace high-alloy materials. The CV joints are severe duty and serviceable, with CNC billet centers. The inner and outer stub ends are billet one-piece. The shafts also feature anti-wheel hop technology.

This part is for off-road use only.

Part number
M-4138-MA
Brand
Ford Racing
Side
Right
Does not fit
2020-2021 GT500
Inner stub end
Billet one-piece, 34-spline
Outer stub end
Billet one-piece, 32-spline
CV joints
Severe duty, serviceable, CNC billet centers
Material
CNC-machined aerospace high-alloy
Use
Off-road use only

Questions and answers

Does it fit my Mustang?
It fits 2015-2021 Mustang EcoBoost, GT and GT350. It does not fit the 2020-2021 GT500.
Is this a pair or one side?
It is the right-side half shaft assembly only. The left side is a separate part.
What are the spline counts?
The inner stub is 34-spline and the outer stub is 32-spline, both billet one-piece.
Are the CV joints rebuildable?
Yes. The severe-duty CV joints are serviceable and use CNC billet centers.
Can I use it on the street?
Ford labels it off-road use only, so it is intended for competition or off-road use.
What is anti-wheel hop technology?
It is a shaft design meant to reduce the axle hop that modified Mustangs can show under hard acceleration.
Where is the Ford Racing Half Shaft Assembly Right Side (2015-2023 Mustang) M-4138-MA cheapest?
At Lethal Performance, for $1,287.50, as of our latest check.
Where can I buy the Ford Racing Half Shaft Assembly Right Side (2015-2023 Mustang) M-4138-MA?
19 stores we checked sell it, including Lethal Performance, Alpha Team Car Customs & Care, OSS Motorsport, Muscle & Trucks, BTRcarcustoms.

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