SKU: SP1578P | UPC: 843115007133
Injen 2006-2011 Honda Civic Si Coupe & Sedan Polished Cold Air Intake
The Injen SP1578P polished cold air intake system delivers more air to your 2006-2011 Honda Civic Si engine for noticeable gains in horsepower and torque. This flagship SP series intake fits Civic Si Coupe and Sedan models including the 2008 MUGEN Si providing deeper breathing for enhanced throttle response and acceleration. Engineered with patented tuning Injen sets the standard in performance air intakes.
Key Features
- MegaRam Technology (Patents 7,359,795 & 7,669,571): Increases air velocity through precision-tuned intake tube for optimal power across RPM range.
- Air Fusion Technology (Patent 7,721,669): Seamless integration of filter and intake tube captures colder denser air for efficiency gains.
- Polished 6061-T6 Aluminum Construction: Mandrel-bent 3-inch tubing with mirror polish finish resists corrosion and heat while improving airflow.
- SuperNano Cotton Filter: Oversized tapered design traps contaminants allowing maximum airflow washable and reusable for long-term performance.
- Fully Enclosed Airbox: Shields incoming air from engine bay heat sources ensuring consistent cold air delivery dyno-proven gains up to 12 HP.
Product Notes
- Easy bolt-on installation uses factory mounting points no cutting or permanent modifications required.
- Oil-free filter media prevents contamination of mass air flow sensor.
- Ships fully assembled ready for immediate install standard ground shipping available.
Installation Notes
- Professional installation recommended.
- Remove stock airbox and intake tube reinstall with provided silicone couplers and clamps.
- Compatible with all stock hardware includes stainless steel clamps and hardware kit.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2006-2011 | Honda | Civic | Si |
| 2008 | Honda | Civic | MUGEN Si |
Why Choose Injen?
- Injen Technology pioneered the world’s first tuned air intake system holding four patents on intake tuning.
- SP series leads with innovations like MegaRam and Air Fusion for real-world power gains.
- Backed by rigorous dyno testing and over 20 years in performance aftermarket engineering.
Frequently Asked Questions
- Q: Does this fit 2006-2011 Honda Civic Si Coupe and Sedan?
A: Yes SP1578P bolts directly onto all 2006-2011 Civic Si models including Coupe Sedan and 2008 MUGEN Si with 2.0L R18 engine no modifications needed. - Q: What material is the intake made from?
A: Mandrel-bent 6061-T6 aluminum tubing with polished finish paired with a SuperNano cotton filter for durability and high airflow. - Q: What is the warranty and install time?
A: Lifetime warranty on tubing one year on filter typical DIY install takes 60-90 minutes with basic hand tools.
Shipping & Handling
- Method: Standard ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Securely boxed 22.5 x 13 x 9.5 inches
- Weight: 7.85 lbs
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