Race High Flow Downpipe for 2013-2017 Honda Accord K24 - 9th Generation
Unlock more power from your 9th generation Honda Accord K24 engine with this 3" race-spec high flow downpipe. Designed to replace the restrictive factory catalytic converter and downpipe for maximum exhaust flow and performance gains.
Performance Specs
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Diameter: 3" (76mm) mandrel-bent tubing
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Design: Catless race downpipe
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Material: T304 stainless steel
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Power Gains: 15-25 HP, 10-20 ft-lbs torque (with tune)
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Fitment: Direct bolt-on replacement
What's Included
- 3" stainless steel downpipe
- Gaskets and hardware
- Installation instructions
Fitment Guide
| Year |
Make |
Model |
Engine |
Notes |
| 2013-2017 |
Honda |
Accord (9th Gen) |
K24W (2.4L) |
Direct fit |
| 2013-2017 |
Honda |
Accord Sport |
K24W |
Direct fit |
| 2013-2017 |
Honda |
Accord EX/EX-L |
K24W |
Direct fit |
Important: Does NOT fit Accord V6 or 2018+ 10th gen models.
Installation Notes
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Difficulty: Intermediate | Estimated Time: 2-3 hours
- Direct bolt-on replacement for factory downpipe
- May require O2 sensor spacer or CEL fix (sold separately)
- Professional installation recommended
- ECU tuning recommended for optimal power gains
-
Off-road use only - removes catalytic converter
- Will not pass emissions testing
Performance Benefits
- 15-25 HP gain with proper tuning
- 10-20 ft-lbs torque increase
- Improved throttle response
- Reduced backpressure and turbo lag
- Aggressive exhaust note
- Better exhaust flow for forced induction builds
Supporting Mods Recommended
- ECU tuning (Hondata FlashPro, KTuner) for best results
- O2 sensor spacer or CEL eliminator
- Cat-back exhaust system (3" recommended)
- Cold air intake
- Upgraded intercooler (for turbo builds)
FAQ
Q: Will this fit my 2018+ Accord?
A: No, this is designed for 2013-2017 9th generation Accord only. 2018+ is 10th gen and requires a different downpipe.
Q: Will I get a check engine light?
A: Likely yes, since this removes the catalytic converter. You'll need an O2 sensor spacer/CEL fix or ECU tuning to eliminate the code.
Q: Is this street legal?
A: No, this is for off-road/race use only. Removing catalytic converters is illegal for street use in most areas and will not pass emissions.
Q: Do I need a tune?
A: While not required, ECU tuning is highly recommended to maximize power gains and optimize fuel delivery with the increased airflow.
Q: What power gains can I expect?
A: With tuning: 15-25 HP and 10-20 ft-lbs torque. Without tuning: 5-10 HP. Best results with full exhaust system and intake.
Q: Will this fit the V6 Accord?
A: No, this is designed for the 4-cylinder K24W engine only.
Q: Does this include O2 sensor bungs?
A: Yes, O2 sensor bungs are welded in. You may still need a spacer or CEL fix to prevent check engine lights.
For off-road/race use only. Removes catalytic converter - not legal for street use. Will not pass emissions testing. Check local laws before installation. Professional installation and tuning recommended.