2006-2011 Honda Civic SI Air Intake Duct
K2 Industries
2006-2011 Honda Civic SI Air Intake Duct
Check fitment before ordering
Match the year, make, model, trim and engine in the product details. Review mounting requirements and vehicle modifications. Ask us about this part.
Eligible returns within 30 days of receipt. Items must be unused, with original packaging and all included parts. Contact Lee Mods before sending anything back. Lee Mods pays return shipping for eligible U.S. returns; no restocking fee. See Returns & Exchanges for full conditions.
Product information from K2 Industries
Manufacturer warranty and guarantee statements below are subject to that manufacturer’s terms. For return eligibility through Lee Mods, see Returns & Exchanges. Ask Lee Mods to clarify any warranty or guarantee before ordering.
2006-2011 Honda Civic SI Air Intake Duct
Engineered to feed cooler, denser air directly into your SI's intake manifold. This hard panel construction duct replaces the factory airbox restriction and bolts to existing mounting points—no fabrication required. Designed for bolt-on installation with basic hand tools.
Key Features
- Cold-air path design - Pulls intake temperature down for measurable gains in responsiveness and power delivery
- OEM fitment precision - Engineered to factory attachment points; eliminates guesswork on alignment
- Hard panel construction - Rigid structure resists flex and maintains intake seal under boost or high RPM
Specs
- Hard panel construction
- Single intake duct assembly
- New condition
Whats Included
- Air intake duct assembly
Frequently Asked Questions
Will this bolt to my factory intake manifold without modification?
Yes. This duct connects at factory mounting points—no drilling, welding, or custom fabrication needed. Test-fit before final tightening to confirm clearance at the intake trumpet.
Do I need to seal the joints where the duct meets the intake?
Depends on your setup. If you're running stock intake components, factory tolerances should handle it. For turbo or supercharger builds, you may want silicone sealant at connection points to prevent boost leaks—check your tuner's recommendation.
Can I reuse the intake filter element from my old airbox?
Not without adapter work. This duct uses a different filter mounting interface than the OEM airbox. You'll need a filter element sized and threaded for this intake's inlet—confirm diameter before ordering.
Your vehicle
Select a vehicle to check the supplied application records for this part.
Choose or change vehicle →Product reference & ordering help
Supplier & part identification
K2 Industries
| Option | SKU / part reference |
|---|---|
| Standard | K2-6685-HON-006-AD |
Vehicle compatibility
Read the application years, model, trim, engine and exclusions in the description above. A make-level collection or product recommendation alone does not confirm fitment.
Request fitment help →Installation & specifications
Review the manufacturer’s specifications and installation notes above. Confirm required mounting hardware, tools and modifications before ordering. If instructions are not supplied, contact us with the part reference.
Shipping expectations
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Shipping & delivery informationManufacturer warranty
Coverage and exclusions vary by manufacturer and part. Review the supplied product documentation or ask us for the applicable terms.
Warranty information