QA1 Lower Boxed Trailing Arms — 1979-2004 Ford Mustang/1979-1986 Mercury Capri

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SKU: QAP5221
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About QA1

QA1 engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full QA1 lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Enhance Traction and Handling with QA1 Lower Boxed Trailing Arms

Optimize your 1979-2004 Ford Mustang or 1979-1986 Mercury Capri's rear suspension performance with QA1's Lower Boxed Trailing Arms. These robust arms are engineered to eliminate bushing bind and flex, ensuring your tires maintain consistent contact with the road for superior traction and predictable handling. By utilizing high-quality construction and advanced bushing technology, these trailing arms are a significant upgrade over stock components.

Key Features and Benefits:

  • Superior Strength: Constructed from 0.120" wall cold-rolled steel tubing, providing exceptional rigidity and resistance to flex.
  • Eliminates Bushing Bind: Features fluted, greasable polyurethane bushings that allow for smoother suspension travel compared to stock rubber bushings.
  • Improved Traction: Keeps tires firmly planted for better acceleration and grip.
  • Enhanced Handling: Contributes to a more predictable and stable driving experience, especially during cornering and braking.
  • Durable Finish: Powder-coated gloss black for a long-lasting, attractive appearance that resists corrosion.
  • Direct Fit Design: Engineered for a precise fit on the specified Ford Mustang and Mercury Capri models.

Vehicle Fitment:

These lower trailing arms are compatible with:

  • 1979-2004 Ford Mustang
  • 1979-1986 Mercury Capri

Whether you're building a street machine or a track-focused vehicle, QA1's Lower Boxed Trailing Arms offer a substantial improvement in performance and durability. Get yours today from GGCRACING!

Vehicle Fitment

Years Make Model Trim
1979-1981 Ford Mustang Base
1979-1981 Ford Mustang Ghia
1981 Ford Mustang Cobra
1982-1983 Ford Mustang GL
1982-1983 Ford Mustang GLX
1982-1984 Ford Mustang L
1982-2004 Ford Mustang GT
1983 Ford Mustang Turbo GT
1984-1986 Ford Mustang SVO
1984-1993 Ford Mustang LX
1993 Ford Mustang SVT Cobra R
1993-1999 Ford Mustang SVT Cobra
1994-2004 Ford Mustang Base
1995 Ford Mustang SVT Cobra R
1995 Ford Mustang GTS
2000 Ford Mustang SVT Cobra R
2001 Ford Mustang GT Bullitt
2001 Ford Mustang SVT Cobra
2003-2004 Ford Mustang Mach 1
2003-2004 Ford Mustang SVT Cobra
1979-1983 Mercury Capri Base
1981-1986 Mercury Capri GS
1982-1983 Mercury Capri L
1982-1983 Mercury Capri Black Magic
1982-1985 Mercury Capri RS
1983 Mercury Capri Crimson Cat
1984 Mercury Capri RS Turbo
1986 Mercury Capri 5.0

Product Details

Product Description
Part Numbers
Sizing & Fit

About QA1

QA1 engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full QA1 lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Enhance Traction and Handling with QA1 Lower Boxed Trailing Arms

Optimize your 1979-2004 Ford Mustang or 1979-1986 Mercury Capri's rear suspension performance with QA1's Lower Boxed Trailing Arms. These robust arms are engineered to eliminate bushing bind and flex, ensuring your tires maintain consistent contact with the road for superior traction and predictable handling. By utilizing high-quality construction and advanced bushing technology, these trailing arms are a significant upgrade over stock components.

Key Features and Benefits:

  • Superior Strength: Constructed from 0.120" wall cold-rolled steel tubing, providing exceptional rigidity and resistance to flex.
  • Eliminates Bushing Bind: Features fluted, greasable polyurethane bushings that allow for smoother suspension travel compared to stock rubber bushings.
  • Improved Traction: Keeps tires firmly planted for better acceleration and grip.
  • Enhanced Handling: Contributes to a more predictable and stable driving experience, especially during cornering and braking.
  • Durable Finish: Powder-coated gloss black for a long-lasting, attractive appearance that resists corrosion.
  • Direct Fit Design: Engineered for a precise fit on the specified Ford Mustang and Mercury Capri models.

Vehicle Fitment:

These lower trailing arms are compatible with:

  • 1979-2004 Ford Mustang
  • 1979-1986 Mercury Capri

Whether you're building a street machine or a track-focused vehicle, QA1's Lower Boxed Trailing Arms offer a substantial improvement in performance and durability. Get yours today from GGCRACING!

Vehicle Fitment

Years Make Model Trim
1979-1981 Ford Mustang Base
1979-1981 Ford Mustang Ghia
1981 Ford Mustang Cobra
1982-1983 Ford Mustang GL
1982-1983 Ford Mustang GLX
1982-1984 Ford Mustang L
1982-2004 Ford Mustang GT
1983 Ford Mustang Turbo GT
1984-1986 Ford Mustang SVO
1984-1993 Ford Mustang LX
1993 Ford Mustang SVT Cobra R
1993-1999 Ford Mustang SVT Cobra
1994-2004 Ford Mustang Base
1995 Ford Mustang SVT Cobra R
1995 Ford Mustang GTS
2000 Ford Mustang SVT Cobra R
2001 Ford Mustang GT Bullitt
2001 Ford Mustang SVT Cobra
2003-2004 Ford Mustang Mach 1
2003-2004 Ford Mustang SVT Cobra
1979-1983 Mercury Capri Base
1981-1986 Mercury Capri GS
1982-1983 Mercury Capri L
1982-1983 Mercury Capri Black Magic
1982-1985 Mercury Capri RS
1983 Mercury Capri Crimson Cat
1984 Mercury Capri RS Turbo
1986 Mercury Capri 5.0

Product Details

Product Description

About QA1

QA1 engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full QA1 lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Enhance Traction and Handling with QA1 Lower Boxed Trailing Arms

Optimize your 1979-2004 Ford Mustang or 1979-1986 Mercury Capri's rear suspension performance with QA1's Lower Boxed Trailing Arms. These robust arms are engineered to eliminate bushing bind and flex, ensuring your tires maintain consistent contact with the road for superior traction and predictable handling. By utilizing high-quality construction and advanced bushing technology, these trailing arms are a significant upgrade over stock components.

Key Features and Benefits:

  • Superior Strength: Constructed from 0.120" wall cold-rolled steel tubing, providing exceptional rigidity and resistance to flex.
  • Eliminates Bushing Bind: Features fluted, greasable polyurethane bushings that allow for smoother suspension travel compared to stock rubber bushings.
  • Improved Traction: Keeps tires firmly planted for better acceleration and grip.
  • Enhanced Handling: Contributes to a more predictable and stable driving experience, especially during cornering and braking.
  • Durable Finish: Powder-coated gloss black for a long-lasting, attractive appearance that resists corrosion.
  • Direct Fit Design: Engineered for a precise fit on the specified Ford Mustang and Mercury Capri models.

Vehicle Fitment:

These lower trailing arms are compatible with:

  • 1979-2004 Ford Mustang
  • 1979-1986 Mercury Capri

Whether you're building a street machine or a track-focused vehicle, QA1's Lower Boxed Trailing Arms offer a substantial improvement in performance and durability. Get yours today from GGCRACING!

Vehicle Fitment

Years Make Model Trim
1979-1981 Ford Mustang Base
1979-1981 Ford Mustang Ghia
1981 Ford Mustang Cobra
1982-1983 Ford Mustang GL
1982-1983 Ford Mustang GLX
1982-1984 Ford Mustang L
1982-2004 Ford Mustang GT
1983 Ford Mustang Turbo GT
1984-1986 Ford Mustang SVO
1984-1993 Ford Mustang LX
1993 Ford Mustang SVT Cobra R
1993-1999 Ford Mustang SVT Cobra
1994-2004 Ford Mustang Base
1995 Ford Mustang SVT Cobra R
1995 Ford Mustang GTS
2000 Ford Mustang SVT Cobra R
2001 Ford Mustang GT Bullitt
2001 Ford Mustang SVT Cobra
2003-2004 Ford Mustang Mach 1
2003-2004 Ford Mustang SVT Cobra
1979-1983 Mercury Capri Base
1981-1986 Mercury Capri GS
1982-1983 Mercury Capri L
1982-1983 Mercury Capri Black Magic
1982-1985 Mercury Capri RS
1983 Mercury Capri Crimson Cat
1984 Mercury Capri RS Turbo
1986 Mercury Capri 5.0

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