2001-05 Honda Civic Cat Back Exhaust System - 1AEMK00112

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Vehicle Fit


  • Includes:
    • (1) - Intermediate Resonator Pipe
    • (1) - Rear Muffler
    • (2) - Gaskets
    • (1) - Spring Bolt Kit
  • Replaces all components behind the converter
  • Direct fit replacements
  • Installs & fits just like the factory exhaust
  • No modifications necessary
  • Built to strict quality control standards
  • Replaces dealer part numbers: 18030S5AJ00, 18030 S5A J00, 744022091, 1418360A11, 7440 22091, 14183 60A11, 18220S5DA03, 18220 S5D A03, 18393SA0000, 18393SH3S00, 18393 SA0 000, 18393 SH3 S00
  • Does not include front flange hardware

Item Condition: New

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

Due to the nature and size, exhaust parts may incur minor dents or scratches from handling and load shifting during shipping. These damages do not affect the fit or function of the part. Neither our 60 Day satisfaction guarantee, nor the manufacturer's warranty, cover these insignificant damages.

  1. step : Removing the Muffler (0:41)
    • Spray rust penetrant on the bolt connecting the muffler to the mid-pipe
    • Remove the bolts that secure the muffler to the mid-pipe with a 13mm socket and wrench
    • Remove the muffler from the hangers
  2. step : Removing the Cat Back (1:24)
    • Spray rust penetrant on the three bolt flange
    • Remove the 13mm bolt from the flange
    • Remove the exhaust pipe from the flange
    • Remove the exhaust hangers from the rear of the mid-pipe
  3. step : Installing the Cat Back (2:53)
    • Clean the gasket surface with a wire brush
    • Insert the bolts and gasket into place
    • Install the rear of the mid-pipe into the hanger
    • Line up the front flange with new hardware
    • Install a washer, lock washer, and nut on each of the new bolts
    • Tighten the 13mm bolts with a socket and ratchet
  4. step : Installing the Muffler (4:17)
    • Insert the gasket to the mid-pipe
    • Insert the muffler into place and on its hangers
    • Insert the springs on the muffler bolts if you have them
    • Replace the 13mm bolts

Tools needed for replacement:

    General Tools

  • Jack Stands
  • Wire Brush
  • Floor Jack

  • Materials, Fluids, and Supplies

  • Rust Penetrant

  • Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Sockets - Metric

  • 12mm Socket
  • 13mm Socket

4.00/ 5.0
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Catback exhaust
Fit just right and the price was better than in store. Only problem was that the bolts didnt seem to long enough. So I bought some from auto parts store.
July 5, 2017
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
Does this come with bolts for mounting mid pipe to cat?
Nick W June 10, 2017
You will need to reuse the original hardware, or purchase through another source.
Alex P June 12, 2017
Whats the diameter of the piping?
Keegan H November 12, 2017
No clue but it was an exact match to what was in my 05 Civic it was a perfect fit. You need all the pipes I could never get them all apart I had cut the old ones off with a metal cutting blade on my grinder
Gary L November 12, 2017
I dont have the exact measurements. Our parts are designed to be exact replacements for what came with the vehicle, so as long as your year, make, and model match up with our listing, these will definitely fit and function just like the original. Please let us know if you have any other questions.
Tim K November 13, 2017
Year Make Model Description
2001-2005Honda Civic Honda Civic EX 4 Door Sedan Cat Back Exhaust System L4 1.7L
2001-2005Honda Civic Honda Civic GX 4 Door Sedan Cat Back Exhaust System L4 1.7L
Part #: 1AEMK00112

Out of Stock

How-to Video:

(05:32 min)