Top 5 Cat-Back Exhausts for the 11th Gen Honda Civic Si

Looking to upgrade the sound and performance of your 11th Gen Honda Civic Si? Whether you're hunting for that aggressive tone, lightweight construction, or just a cleaner rear-end aesthetic, a quality cat-back exhaust is one of the best mods you can throw on your Si. 

Here's a rundown of the top five systems making waves on our site—and why they’re worth a closer look if you're serious about giving your Civic Si the best voice and airflow it can possibly make.

Read More: Profiling Our Best Civic Si Performance Kits From MAPerformance

Apexi N1-X Evolution Extreme

If you're into that classic JDM styling and a truly aggressive tone, the Apexi N1-X Evolution Extreme delivers. Built from 304 stainless steel and finished with titanium round dual-wall angle-cut tips, this setup combines form and function. It features a 3-piece system with welded-on tips and built-in Apexi sound resonators near the rear.

• Material: 304 stainless steel
  
  

• Features: Welded titanium tips, built-in resonators, JDM look
  
  

• Exhaust Tone: Aggressive with a deep, sporty growl

MAPerformance Cat-Back Exhaust

This system is hand-welded in our warehouse using 304 stainless steel and comes in two configurations: Street (muffler-equipped) or Race (muffler-delete). You can choose between polished or burnt titanium tips, both of which are adjustable thanks to a slip-fit design.

• Material: Hand-welded 304 stainless steel
  
  

• Tip Options: Polished, burnt blue, carbon fiber
  
  

• Versions: Street (quieter), Race (louder)
  
  

• Unique Feature: Modular design—swap between Street and Race axle-backs

Remark Sports Touring Cat-Back

Looking for a great entry-level cat-back around $1,000? The Remark Sports Touring system might be just what you need, as it offers budget-friendly performance without compromising on quality. It uses full 304 stainless steel and offers either standard or burnt tip options. This system retains the OEM twin-loop style, a rare and visually distinct design, and includes a mid-pipe resonator to help reduce drone.

• Material: 304 stainless steel
  
  

• Tip Options: Stainless or burnt stainless (welded-on)
  
  

• Style: OEM twin-loop homage
  
  

• Sound Profile: Subtle with a livable tone

DC Sports Cat-Back Exhaust

DC Sports brings a polished, refined cat-back option to the table. Their cat-back features a 6-piece design and includes three resonators and a muffler, aiming for a quieter, gentleman-style tone. It's made from T304 stainless steel and includes polished weld-on tips with a slightly extended finish for an aggressive, clean rear view.

• Material: T304 stainless steel
  
  

• Design: 6-piece, triple resonator, muffler included
  
  

• Tip Style: Polished dual exit
  
  

• Sound Profile: Smooth and mellow with premium finish
  
  

PRL Motorsports N1 Single Exit

New to the list and turning heads fast, the PRL N1 system brings a single-exit design that pays homage to old-school Honda performance. Built from stainless steel and designed as a direct bolt-on with slip-fit adjustability, this system is lightweight, durable, and sounds fantastic for the price.

• Material: Full stainless steel
  
  

• Design: Single-exit, slip-fit adjustment
  
  

• Installation: Direct-fit with all hardware included
  
  

• Style/Sound: Lightweight, aggressive, nostalgic
  
  

Shop All 11th Gen Si Parts In Our Store

Wrap-Up - Shop Civic Si Cat-Back Exhausts At MAPerformance

That’s our list of the top five cat-back exhausts for the 11th Gen Honda Civic Si. Each offers a unique combination of tone, build quality, and value. Whether you're leaning toward a dual-exit setup or want that old-school single-exit vibe, there's something here for every Civic Si driver.

If you're interested in grabbing one of these systems, check out the product links on our site—especially for the MAPerformance cat-back, which may be in stock depending on when you're reading this. Think we missed a contender? Let us know in the comments, and keep an eye out for updated picks if new systems drop from brands like HKS or GReddy.

Stay tuned and stay modding.