GReddy Supreme SP Catback Exhaust System — Fits 2017-2020 Honda Civic Si Sedan

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SKU: GRE10158217
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Sale price$899.01 Regular price$900.00
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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 GReddy

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

Watch in action

Elevate Your Civic Si Performance

Unlock the true potential of your 2017-2020 Honda Civic Si Sedan with the GReddy Supreme SP Catback Exhaust. Engineered for enthusiasts who demand a perfect balance of street-friendly sound and performance gains, this system is the gold standard for your L15B7 engine.

Precision Engineering

The Supreme SP series is renowned for its high-quality stainless steel construction and meticulous craftsmanship. By optimizing exhaust gas flow, this catback system reduces backpressure, resulting in improved throttle response and a deeper, more aggressive exhaust note that remains refined at cruising speeds.

  • Direct bolt-on fitment for 2017-2020 Honda Civic Si Sedan
  • High-grade stainless steel piping for long-lasting durability
  • Large-diameter piping to maximize exhaust scavenging
  • Signature GReddy Supreme SP muffler design
  • Includes all necessary hardware for a seamless installation

Whether you are hitting the track or navigating daily commutes, this exhaust system provides the perfect auditory upgrade without the drone associated with cheaper alternatives. The sleek finish ensures your Civic looks as good as it sounds. Trust GGCRACING for your performance exhaust needs.

Vehicle Fitment

Years Make Model Trim
2017-2020 Honda Civic Si

Product Details

Product Description
Part Numbers
Sizing & Fit

About GReddy

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

Watch in action

Elevate Your Civic Si Performance

Unlock the true potential of your 2017-2020 Honda Civic Si Sedan with the GReddy Supreme SP Catback Exhaust. Engineered for enthusiasts who demand a perfect balance of street-friendly sound and performance gains, this system is the gold standard for your L15B7 engine.

Precision Engineering

The Supreme SP series is renowned for its high-quality stainless steel construction and meticulous craftsmanship. By optimizing exhaust gas flow, this catback system reduces backpressure, resulting in improved throttle response and a deeper, more aggressive exhaust note that remains refined at cruising speeds.

  • Direct bolt-on fitment for 2017-2020 Honda Civic Si Sedan
  • High-grade stainless steel piping for long-lasting durability
  • Large-diameter piping to maximize exhaust scavenging
  • Signature GReddy Supreme SP muffler design
  • Includes all necessary hardware for a seamless installation

Whether you are hitting the track or navigating daily commutes, this exhaust system provides the perfect auditory upgrade without the drone associated with cheaper alternatives. The sleek finish ensures your Civic looks as good as it sounds. Trust GGCRACING for your performance exhaust needs.

Vehicle Fitment

Years Make Model Trim
2017-2020 Honda Civic Si

Product Details

Product Description

About GReddy

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

Watch in action

Elevate Your Civic Si Performance

Unlock the true potential of your 2017-2020 Honda Civic Si Sedan with the GReddy Supreme SP Catback Exhaust. Engineered for enthusiasts who demand a perfect balance of street-friendly sound and performance gains, this system is the gold standard for your L15B7 engine.

Precision Engineering

The Supreme SP series is renowned for its high-quality stainless steel construction and meticulous craftsmanship. By optimizing exhaust gas flow, this catback system reduces backpressure, resulting in improved throttle response and a deeper, more aggressive exhaust note that remains refined at cruising speeds.

  • Direct bolt-on fitment for 2017-2020 Honda Civic Si Sedan
  • High-grade stainless steel piping for long-lasting durability
  • Large-diameter piping to maximize exhaust scavenging
  • Signature GReddy Supreme SP muffler design
  • Includes all necessary hardware for a seamless installation

Whether you are hitting the track or navigating daily commutes, this exhaust system provides the perfect auditory upgrade without the drone associated with cheaper alternatives. The sleek finish ensures your Civic looks as good as it sounds. Trust GGCRACING for your performance exhaust needs.

Vehicle Fitment

Years Make Model Trim
2017-2020 Honda Civic Si

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