Race Header/Downpipe for K24 TSX & Accord - High Flow Performance
Maximize performance from your K24Z2 or K24Z3 engine with this race-spec header and downpipe combo. Designed for 2009-2014 Acura TSX and 2008-2012 Honda Accord, this replaces the restrictive factory catalytic converter and exhaust manifold for significant power gains.
Performance Specs
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Design: Full race header with integrated downpipe
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Material: T304 stainless steel
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Configuration: Catless race design
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Power Gains: 15-20 HP, 10-15 ft-lbs torque (with tune)
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Fitment: Direct bolt-on for K24Z2/K24Z3
What's Included
- K-Series race header with integrated downpipe
- Gaskets and hardware
- Installation instructions
Fitment Guide
| Year |
Make |
Model |
Engine |
Notes |
| 2009-2014 |
Acura |
TSX |
K24Z2, K24Z3 |
Direct fit |
| 2008-2012 |
Honda |
Accord (8th Gen) |
K24Z2, K24Z3 |
Direct fit |
| 2008-2012 |
Honda |
Accord EX/EX-L |
K24Z2, K24Z3 |
Direct fit |
Important: Only fits K24Z2 and K24Z3 engines. Does NOT fit K24A or other K24 variants.
Installation Notes
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Difficulty: Advanced | Estimated Time: 3-4 hours
- Direct bolt-on replacement for factory header and downpipe
- May require O2 sensor spacer or CEL fix (sold separately)
- Professional installation recommended
- ECU tuning recommended for optimal power gains
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Off-road use only - removes catalytic converter
- Will not pass emissions testing
Performance Benefits
- 15-20 HP gain with proper tuning
- 10-15 ft-lbs torque increase
- Improved exhaust flow and scavenging
- Better throttle response
- Aggressive exhaust note
- Reduced backpressure
- Optimized for naturally aspirated K24 builds
Supporting Mods Recommended
- ECU tuning (Hondata FlashPro, KTuner) for best results
- O2 sensor spacer or CEL eliminator
- Cat-back exhaust system (2.5" recommended)
- Cold air intake
- High-flow cat (if emissions compliance needed)
FAQ
Q: Will this fit my 2013-2017 Accord?
A: No, this is designed for 2008-2012 8th generation Accord only. 2013+ is 9th gen and requires a different header/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: Recommended but not required. With tuning you'll see 15-20 HP gains. Without tuning, gains are 5-10 HP.
Q: What's the difference between K24Z2 and K24Z3?
A: K24Z2 is in the TSX, K24Z3 is in the Accord. This header fits both engines - they share the same exhaust port configuration.
Q: Will this fit my K24A TSX?
A: No, this is designed for K24Z2/Z3 only (2009+ TSX, 2008-2012 Accord). Earlier K24A engines have different exhaust ports.
Q: What power gains can I expect?
A: With tuning: 15-20 HP and 10-15 ft-lbs torque. Best results with full exhaust system and intake. The K24 responds well to header upgrades.
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.