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

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SKU: CUS420 541 A
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Superior Rear Chassis RigidityThe Cusco OS Rear Strut Bar is ...Read More

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Sale price$180.99 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

Superior Rear Chassis Rigidity

The Cusco OS Rear Strut Bar is the ultimate solution for reducing rear-end chassis flex in your Mazda RX-7 FC3S. By tying the rear strut towers together, this bar prevents the chassis from distorting under heavy cornering loads, allowing your suspension components to work exactly as intended. This results in sharper turn-in, improved rear-end stability, and a more connected feel between the driver and the road.

Performance Advantages

  • OS-style shaft for optimal strength-to-weight ratio
  • Reinforces rear strut towers to prevent metal fatigue
  • Improves suspension efficiency and tire grip
  • Sleek, iconic Cusco blue finish
  • Easy installation with basic hand tools

Designed to fit perfectly within the rear cargo area of the FC3S, the Cusco OS bar provides a rigid bridge that minimizes body roll and chassis flex. This is an essential upgrade for any enthusiast running stiffer suspension setups, as it helps manage the increased forces transferred to the chassis. By maintaining the structural integrity of the rear towers, you ensure that your alignment settings remain stable even during the most demanding driving conditions. Experience the difference in handling precision with this premium component from GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

Superior Rear Chassis Rigidity

The Cusco OS Rear Strut Bar is the ultimate solution for reducing rear-end chassis flex in your Mazda RX-7 FC3S. By tying the rear strut towers together, this bar prevents the chassis from distorting under heavy cornering loads, allowing your suspension components to work exactly as intended. This results in sharper turn-in, improved rear-end stability, and a more connected feel between the driver and the road.

Performance Advantages

  • OS-style shaft for optimal strength-to-weight ratio
  • Reinforces rear strut towers to prevent metal fatigue
  • Improves suspension efficiency and tire grip
  • Sleek, iconic Cusco blue finish
  • Easy installation with basic hand tools

Designed to fit perfectly within the rear cargo area of the FC3S, the Cusco OS bar provides a rigid bridge that minimizes body roll and chassis flex. This is an essential upgrade for any enthusiast running stiffer suspension setups, as it helps manage the increased forces transferred to the chassis. By maintaining the structural integrity of the rear towers, you ensure that your alignment settings remain stable even during the most demanding driving conditions. Experience the difference in handling precision with this premium component from GGCRACING.

Product Details

Product Description

Superior Rear Chassis Rigidity

The Cusco OS Rear Strut Bar is the ultimate solution for reducing rear-end chassis flex in your Mazda RX-7 FC3S. By tying the rear strut towers together, this bar prevents the chassis from distorting under heavy cornering loads, allowing your suspension components to work exactly as intended. This results in sharper turn-in, improved rear-end stability, and a more connected feel between the driver and the road.

Performance Advantages

  • OS-style shaft for optimal strength-to-weight ratio
  • Reinforces rear strut towers to prevent metal fatigue
  • Improves suspension efficiency and tire grip
  • Sleek, iconic Cusco blue finish
  • Easy installation with basic hand tools

Designed to fit perfectly within the rear cargo area of the FC3S, the Cusco OS bar provides a rigid bridge that minimizes body roll and chassis flex. This is an essential upgrade for any enthusiast running stiffer suspension setups, as it helps manage the increased forces transferred to the chassis. By maintaining the structural integrity of the rear towers, you ensure that your alignment settings remain stable even during the most demanding driving conditions. Experience the difference in handling precision with this premium component from GGCRACING.

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