Injen SP1578BLK SP Series Cold Air Intake for 2006-2011 Honda Civic Si 2.0L I4

Vehicle Fitment

• 2006-2011 Honda Civic Si (Coupe & Sedan, 2.0L I4)

Fitment Notes

• Fits Si trim only - does not fit base, EX, or non-Si Civic models
• CARB Exempt - EO# D-476-8; legal for use in California

Features

• Injen's patented MegaRam (MR) Technology maintains safe air/fuel ratio without retune
• Dyno-proven gains of up to +10.7 HP and +11.2 lb-ft of torque
• Air Fusion Technology improves charge density for more complete combustion
• 6061-T6 mandrel-bent aluminum intake tubing for smooth, unrestricted airflow
• SuperNano-Web dry air filter - washable, reusable, and high-flow
• CNC-machined brackets and adapters ensure precise, rattle-free fitment
• Aggressive induction sound under throttle for enhanced driving experience
• Backed by Injen's Limited Lifetime Warranty; made in Pomona, California, USA

Specifications

• Finish: Wrinkle Black
• Tube Material: 6061-T6 Aluminum
• Filter Part Number: X-1014-BB (SuperNano-Web Dry)
• HP Gain: Up to +10.7 HP
• Torque Gain: Up to +11.2 lb-ft
• CARB EO#: D-476-8
• Weight: 8.0 lbs
• Package Dimensions: 26.0"L x 14.0"W x 9.0"H

Included Components

• 1x Wrinkle Black aluminum intake tube
• 1x Injen SuperNano-Web dry air filter (X-1014-BB)
• 1x Hardware kit (clamps, brackets, adapters)
• 1x Installation instructions

Product Description

The Injen SP1578BLK is a direct-fit cold air intake system designed specifically for the 2006-2011 Honda Civic Si with the 2.0L I4 engine. It positions the high-flow SuperNano-Web dry filter in a cooler air zone, delivering denser intake charges for improved combustion efficiency. Injen's patented MegaRam (MR) Technology steps down the intake tube diameter at the MAF sensor mount, keeping the air/fuel ratio within safe factory parameters - no tune required.

Built from 6061-T6 aluminum with CNC-machined hardware, this system installs with basic hand tools and drops in without modification. The wrinkle black finish adds a clean underhood appearance, while the aggressive induction tone under throttle gives the Si a more spirited feel. Optional Hydroshields (1033BLK or 1033RED) are available separately for added filter protection in wet conditions.