GReddy DD-R Catback Exhaust | 2017-2021 Honda Civic Si Sedan (10158601)


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$940.50 $990.00Instant Savings of 5% ($49.50)

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2017-2021 Honda Civic Si Sedan DD-R Exhaust System by GReddy

With our distinctive style and design, the Greddy Performance Products DD-R is our modern take on the highly-sought after GReddy DD Dynamic Dual€� exhaust of the past.

Our iconic DD exhausts have always been recognized for its aggressive dual exit look and deep GReddy sound, but with this new DD-R, we also incorporated updated and improved full 304 stainless-steel construction.

The GPP DD-R has been adapted to modern tuner cars to not only enhance the looks and sound, but to improve performance with its carefully designed dual high-flow straight-through muffler layouts. Another new feature on the DD-R is the tunability. With the new twin removable tips, new options for tips finishers and silencers, now allow the owner to fine tune the looks, sound and flow of their DD-R.


  • Full 304 Stainless Steel Construction
  • 3" High-Flow, Straight-Through Design
  • Dual Muffler Layout w/ Twin Tips
  • Tips Are Removable For Future Customization


  • 2017 - 2021 Honda Civic Si Sedan

What's In The Box?

  • 1 - GReddy DD-R Exhaust System


  • GReddy Limited Lifetime Warranty

Customer Reviews

Based on 4 reviews
Andy Petronella
Great Exhaust

I absolutely love this exhaust. It sounds amazing and it looks amazing. Definitely the best choice for the 10th gen civic.

Caleb Hunt
Best Exhaust out there!

Greddy does a nice job with the deep tone. Sounds amazing!!

Looks good...

Havent installed it yet... but so far so good... look great out the package. came with good gaskets also.

Great exhaust!

I was looking for something with a deep tone and great look. Greddy did not disappoint, this exhaust is amazing!