If you're looking to give your 2006-2011 Honda Civic Si 2.0L a serious boost, the HPS Polish Cold Air Intake Kit is where it's at. This isn't just another pretty piece of hardware; it’s built for both performance and style. By relocating the HPS Performance Air Filter outside of the engine bay, it grabs the coolest air possible, which is a game changer for your engine. Forget those traditional short-ram intakes; this long ram setup brings in cooler, denser air that packs a punch in the combustion chamber. We’re talking about a solid +8.9 Whp horsepower and +7.1 Ft/lbs torque increase, plus a noticeable improvement in throttle response.

Installation? It’s straightforward, thanks to the included manual that lays out everything with clear pictures and easy-to-follow steps. You won’t need to tune your car after installing this kit, which is a big plus for those of us who want to keep things simple. Just a heads-up: you’ll need to remove the front bumper to make the install smoother, but once that’s out of the way, you’re golden.

The kit features lightweight, mandrel-bent aluminum piping that replaces the restrictive stock air box, optimizing airflow like nobody’s business. And those race-proven silicone hoses? They’re reinforced to handle whatever you throw at them, plus the industrial-grade stainless steel T-bolt clamps ensure everything stays put, even when you're pushing your Civic to its limits.

Oh, and let’s not forget about the HPS Performance Air Filter itself. Made right here in the USA, it’s washable and reusable, so you’re saving money in the long run. This filter traps dirt down to 5 microns while still allowing for superior airflow—perfect for keeping your engine happy without clogging up sensors.

Key Features of the HPS Cold Air Intake Kit
- Dyno-proven gains: +8.9 Whp and +7.1 Ft/lbs torque with improved throttle response. No tuning required post-install.
- Includes robust HPS silicone hoses and 100% stainless steel T-bolt clamps for reliability.
- 2.75" mandrel-bent aluminum piping enhances airflow and replaces the restrictive stock setup.
- Comes with an air straightener to help prevent check engine lights from popping up.
- A silicone coolant re-route hose is included to avoid any rubbing issues with the stock coolant line.
- Features the HPS Performance Air Filter (Part Number: HPS-4275)—washable and reusable for long-term savings.
- Step-by-step installation manual with clear images makes it easy for anyone to tackle the job.
- Color: Polish
- Not CARB compliant.
- Specifically designed for 2006-2011 Honda Civic Si 2.0L.

Highlights of the HPS Performance Air Filter

Woven cotton filter element
- Traps dirt down to 5 microns, ensuring excellent filtration without sacrificing airflow.
- Washable and reusable, so you don’t have to keep buying new filters.

Light-weight synthetic oil
- Forms an ionic bond with the filter's stainless steel mesh, attracting dirt while keeping airflow clear.
- Safe for your sensors—no worries about damage.

Stainless steel mesh reinforcement
- More resistant to dents compared to aluminum mesh, ensuring durability.

Low pressure injection molding
- Reduces rubber seepage onto the filter element, boosting airflow by up to 25% compared to high-pressure molding.

Made in the USA by Green Filter
- Known for crafting top-notch filters used by racing engineers and enthusiasts who consistently perform at the highest levels.

Fitment:
HPS Performance Cold Air Intake Kit for 2006-2011 Honda Civic Si 2.0L, Polish (Part Number: 837-598P).