GReddy Supreme SP Exhaust | 2017-2021 Honda Civic Sport Hatch (10158212)


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2017-2021 Honda Civic Sport Hatch Supreme SP Exhaust by GReddy

The Supreme SP cat-back exhaust, for the turbocharged 10th generation Honda Civic Sport hatchback, improves the performance, sound quality and styling, by applying our signature SP (Street Performance) ideals into the design.

The system not only incorporates large 76mm (3”) piping, but smoothest out and simplifies the heavier, factory, two muffler layout with a free flowing, compact single entry, dual outlet, oval SP muffler. This allows the turbocharged L15 engine to be more efficient for added performance, without having drone or being loud. The Supreme SP sound level was carefully tuned not to require any additional resonators; this also helps lighten up the system.

The polished stainless-steel center-exit exhaust is finished off with stylish dual, double-wall, slant cut GReddy tips, to enhance the Civics sporty rear diffuser. Like all GReddy Supreme SP systems, the fully hand-welded 304 Stainless-Steel exhausts carry a Limited Lifetime Warranty


  • Fully Hand-Welded 304 Stainless Steel
  • Large 76mm (3") Diameter Piping
  • Free Flowing, Compact Single Entry, Dual Outlet Muffler
  • Improved Performance and Sound w/o Drone
  • Carefully Tuned Not To Require Additional Resonators
  • Finished Off w/ Stylish Dual, Double-Wall, Slant-Cut Tips


  • Increased Horsepower Output
  • Louder and More Aggressive Exhaust Note


  • 2017-2021 Honda Civic Sport Hatch

What's In The Box?

  • 1 - Exhaust System


  • GReddy's Standard Limited Warranty

Customer Reviews

Based on 11 reviews
Greedy Exhaust

Very happy with this purchase. The exhaust defiantly adds a deeper tone but isn’t too loud. Install wasn’t too bad either. For the price, it’s hard to complain especially when the quality is great!

Matthew Hart
How the Civic Should Sound

Finally installed this, and I have got to say, this thing sounds amazing. The first car mod I installed and it was pretty easy, and the fit was good and everything was straightforward. The exhaust sounds amazing, deep, and has a nice low drone while cruising on the highway. I wanted an exhaust with a nice low sound and a little bit of a drone, and this is the perfect one for me. It's not annoying and still keeps the car enjoyable. For the price, I think this is an awesome product and how the Civic should sound out of the factory.

-Installed on 2021 Civic Hatchback Sport Touring

Quiet & deep

I find this exhaust perfect pretty quiet with a deep rumble, installation was easy shipping was quick. Do recommend.

Eric Gallegos
Epic low-end sound... But a little quiet for my taste.

After reading previous reviews, this exhaust sounded like exactly what I was looking for. I wanted something with a good sound but wouldn't attract too much attention.
It does the first bit well! But I think it does the second thing a bit too well... It makes a nice sound, but not enough sound for me.
There's no resonator in the system but surprisingly there's no drone either. On the highway I can listen to music or hold a conversation with the people in the car without interruption which is really nice.

But when I'm feeling like pressing down the pedal, not a lot happens. Sure it's quicker on the acceleration, but it should be paired with more sound as well. If I'm playing my music loud, I won't be able to hear the exhaust which is a bummer. I find myself keeping the volume low to hear the exhaust :/

Don't get me wrong, it's an awesome exhaust with an epic low rumble sound! I dare say that it almost sounds like a Subaru 👀
It's fine for right now. I'm driving a civic anyways lol

But to be honest, if you're looking something on the aggressive side, I would definitely steer clear from this choice.
I like it a lot, but I don't love it. I wish it was just a tad noisier. But that's just me.
If you're merely looking for the performance aspect of it without making a lot of noise, than this is absolutely perfect for you.
I think maybe paired with a front pipe/ down pipe, it'll wake up the exhaust more!

Mild and wild!

First impressions of this exhaust was that it had a very nice build quality with thick tubing through the entire system. When it was installed I was a little underwelmed about the sound of the exhaust until I took it for a test drive. It's very sporty and has a great sound to it compared to many other exhausts on the market. It's how a civic sport hatch should sound from factory. Other systems can sound very ricey and throaty and loud with a high pitch but this exhaust has a really good growl at high rpms.