Cusco Strut Bar OS-T Rear Chassis Brace — Fits 1986-1991 Mazda RX-7 FC3S

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SKU: CUS420 544 A
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About Cusco Cusco Japan engineers the strut-tower braces, sway bars, ...Read More

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Sale price$185.62 Regular price$220.00
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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 Cusco

Cusco Japan engineers the strut-tower braces, sway bars, alignment correction, and limited-slip differentials that power JDM and time-attack programs. The brand behind countless Time Attack and grassroots motorsport podiums.

Watch in action

Precision Handling for the FC3S

The Cusco OS-T Rear Strut Bar offers a refined approach to chassis stiffening for the Mazda RX-7 FC3S. This high-performance brace is designed to bridge the rear strut towers, effectively neutralizing chassis flex that occurs during high-G cornering. By limiting the movement of the strut towers, the OS-T bar ensures that your suspension geometry remains consistent, providing you with the confidence to push your RX-7 to its limits.

Why Choose the OS-T Design?

  • Advanced OS-T shaft design for superior structural rigidity
  • Eliminates rear chassis flex and improves feedback
  • Precision-engineered for a perfect fit in the FC3S
  • Durable, high-quality construction
  • Enhances overall vehicle handling and stability

Whether you are navigating tight corners on a track or enjoying a spirited drive on winding roads, the Cusco OS-T Rear Strut Bar significantly improves the responsiveness of your vehicle. It is an essential modification for those seeking to optimize their suspension setup and maximize tire performance. The bar is lightweight yet incredibly strong, ensuring that you gain the benefits of a stiffer chassis without adding unnecessary weight. Elevate your driving experience with this precision-engineered component from GGCRACING.

Vehicle Fitment

Years Make Model Trim
1986-1987 Mazda RX-7 Base
1986-1990 Mazda RX-7 GXL
1986-1991 Mazda RX-7 Turbo
1987 Mazda RX-7 LX 2+2
1987 Mazda RX-7 Sport
1987 Mazda RX-7 Base 2+2
1987-1990 Mazda RX-7 GXL 2+2
1988 Mazda RX-7 SE
1988 Mazda RX-7 SE 2+2
1988 Mazda RX-7 10th Anniversary
1988-1990 Mazda RX-7 GTU
1988-1991 Mazda RX-7 Convertible
1989-1990 Mazda RX-7 GTUs
1991 Mazda RX-7 Base

Product Details

Product Description
Part Numbers
Sizing & Fit

About Cusco

Cusco Japan engineers the strut-tower braces, sway bars, alignment correction, and limited-slip differentials that power JDM and time-attack programs. The brand behind countless Time Attack and grassroots motorsport podiums.

Watch in action

Precision Handling for the FC3S

The Cusco OS-T Rear Strut Bar offers a refined approach to chassis stiffening for the Mazda RX-7 FC3S. This high-performance brace is designed to bridge the rear strut towers, effectively neutralizing chassis flex that occurs during high-G cornering. By limiting the movement of the strut towers, the OS-T bar ensures that your suspension geometry remains consistent, providing you with the confidence to push your RX-7 to its limits.

Why Choose the OS-T Design?

  • Advanced OS-T shaft design for superior structural rigidity
  • Eliminates rear chassis flex and improves feedback
  • Precision-engineered for a perfect fit in the FC3S
  • Durable, high-quality construction
  • Enhances overall vehicle handling and stability

Whether you are navigating tight corners on a track or enjoying a spirited drive on winding roads, the Cusco OS-T Rear Strut Bar significantly improves the responsiveness of your vehicle. It is an essential modification for those seeking to optimize their suspension setup and maximize tire performance. The bar is lightweight yet incredibly strong, ensuring that you gain the benefits of a stiffer chassis without adding unnecessary weight. Elevate your driving experience with this precision-engineered component from GGCRACING.

Vehicle Fitment

Years Make Model Trim
1986-1987 Mazda RX-7 Base
1986-1990 Mazda RX-7 GXL
1986-1991 Mazda RX-7 Turbo
1987 Mazda RX-7 LX 2+2
1987 Mazda RX-7 Sport
1987 Mazda RX-7 Base 2+2
1987-1990 Mazda RX-7 GXL 2+2
1988 Mazda RX-7 SE
1988 Mazda RX-7 SE 2+2
1988 Mazda RX-7 10th Anniversary
1988-1990 Mazda RX-7 GTU
1988-1991 Mazda RX-7 Convertible
1989-1990 Mazda RX-7 GTUs
1991 Mazda RX-7 Base

Product Details

Product Description

About Cusco

Cusco Japan engineers the strut-tower braces, sway bars, alignment correction, and limited-slip differentials that power JDM and time-attack programs. The brand behind countless Time Attack and grassroots motorsport podiums.

Watch in action

Precision Handling for the FC3S

The Cusco OS-T Rear Strut Bar offers a refined approach to chassis stiffening for the Mazda RX-7 FC3S. This high-performance brace is designed to bridge the rear strut towers, effectively neutralizing chassis flex that occurs during high-G cornering. By limiting the movement of the strut towers, the OS-T bar ensures that your suspension geometry remains consistent, providing you with the confidence to push your RX-7 to its limits.

Why Choose the OS-T Design?

  • Advanced OS-T shaft design for superior structural rigidity
  • Eliminates rear chassis flex and improves feedback
  • Precision-engineered for a perfect fit in the FC3S
  • Durable, high-quality construction
  • Enhances overall vehicle handling and stability

Whether you are navigating tight corners on a track or enjoying a spirited drive on winding roads, the Cusco OS-T Rear Strut Bar significantly improves the responsiveness of your vehicle. It is an essential modification for those seeking to optimize their suspension setup and maximize tire performance. The bar is lightweight yet incredibly strong, ensuring that you gain the benefits of a stiffer chassis without adding unnecessary weight. Elevate your driving experience with this precision-engineered component from GGCRACING.

Vehicle Fitment

Years Make Model Trim
1986-1987 Mazda RX-7 Base
1986-1990 Mazda RX-7 GXL
1986-1991 Mazda RX-7 Turbo
1987 Mazda RX-7 LX 2+2
1987 Mazda RX-7 Sport
1987 Mazda RX-7 Base 2+2
1987-1990 Mazda RX-7 GXL 2+2
1988 Mazda RX-7 SE
1988 Mazda RX-7 SE 2+2
1988 Mazda RX-7 10th Anniversary
1988-1990 Mazda RX-7 GTU
1988-1991 Mazda RX-7 Convertible
1989-1990 Mazda RX-7 GTUs
1991 Mazda RX-7 Base

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