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K-Tuned 12-15 Civic Si Sedan Cat-Back Exhaust System
K-Tuned 12-15 Civic Si Sedan Cat-Back Exhaust System

K-Tuned 12-15 Civic Si Sedan Cat-Back Exhaust System

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The K-Tuned 9th Gen 2012-2015 Civic Sedan Cat Back Exhaust System uses a proven design to reduce restriction and deliver significant power gains, especially in the upper rpm range, where the K engine loves to breathe. 


  • We used large diameter 3" mandrel-bent piping, that really is 3" in diameter when measured, to make sure exhaust gases exit quickly.
  • There is a bit more room underneath the 9th Gen Civic chassis, so we used the additional space to install a large resonator that helps reduce the noise level and smooth out the sound. 
  • On the rear section, the oval muffler is just like our others and is fully polished with a 4" double wall slash cut tip. 
  • The interior of all our mufflers is densely packed with a premium sound suppression material that won't deteriorate like cheaper low grade packing will. 
  • All the joints and flanges are skillfully TIG welded by hand, and believe us, you really have to see these welds in person to appreciate them.
  • The exhaust system comes with all the necessary gaskets and hardware for installation.
  • Note: Light grinding of rear sway bar bracket may be required.
  • will ship from ktuned if none in store 


WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects.