Skunk2 drew upon its experience and longstanding technical partnership with championship-winning Compass360 Racing when developing the Skunk2 Composite Cold Air Intake for the ’06-11 Civic Si. The results are the best performing, best fitting intake system available.Skunk2’s Cold Air Intake is manufactured from molded polymer plastic for superior intake air insulation when compared to aluminum as well as for a smooth, continuous taper. When compared to aluminum, the thicker polymer material results in a superior thermal barrier and lower intake air temperatures. Each kit includes a 3.5-inch internal diameter lower tube and a tapered, 3.5-inch to 3.0-inch internal diameter upper tube that connects to the factory throttle body with a high-quality, silicone connector (larger diameter connector for use with Skunk2 throttle bodies or similar sold separately). The two-piece design and supplied MAF sensor adapter allows for compatibility with vehicles utilizing the factory ECU. A silicone coupler featuring a smooth, tapered transition between the two tubes is also included for vehicles equipped with aftermarket engine management systems that don’t utilize MAF sensors.In an effort to reduce the possibility of submerging the air filter during wet conditions, Skunk2’s design positions the air filter downward-facing for approximately two inches of additional ground clearance when compared to competitors’ designs that locate the air filter from the side. That, combined with a design that doesn’t require cutting or modifying the factory fender liners, greatly reduces the chances of water entering the intake during wet conditions.Each Cold Air Intake kit includes relocation hardware for the battery, ECU, fuse box, and cooling system reservoir tank as well as high-quality stainless steel clamps and mounting hardware. Unlike other intake systems, only Skunk2’s unique design and brackets allow for the OEM battery to be retained. A specially shaped, silicone upper radiator hose is also included with each kit to ensure maximum clearance for the intake tubing and proper fitment.Skunk2 developed its unique Cold Air Intake system in 2009 for back-to-back Grand-Am champions and racing partners Compass360 Racing. Now that the team is retiring its eighth-generation Civic race cars, we can finally release this race-proven technology to enthusiasts.Features:Molded Polymer Plastic construction delivers reduced intake air temperaturesIncludes all necessary hardware and mounting bracketsFull 3.5 Inch tubing tapers to 3 Inch at throttle body for bolt-on fitmentDown-facing filter reduces possibility of water intake during wet conditionsNo cutting or modifying of vehicle necessaryRetains OEM Battery locationSupplied MAF adapter for OEM ECU compatibilityFits: 2006-2011 Honda Civic Si
A**T
Great but it does have its flaws.
Dyno video: [...]ProsLooks great under the hood.3.5" non-metallic piping (heat reduction)Silicone that connects to throttle body is shaped like a velocity stackConsTaps are plastic unlike the metal ones seen in the pictureThe filter feels poorly made, it does not feel like a K&N filter. I might consider replacing it with an AEM dryflow.Filter does not connect to tubing very well, if you tighten it too much it slips right off. Yes, that means if this happens on the road you won't know it because the mudguard will keep it from falling onto the street.CommentsOverall I think it's a great design. I chose this over the Hybrid Racing 3.5" CAI because I wanted to keep my battery in the engine bay. Used Skunk2's installation video on YouTube to help with installation.Notes:I will upload pictures of the CAI and dyno.226 whp & 161 wtqSkunk2 Cold Air IntakeSkunk2 Alpha HeaderInvidia Q300 Cat-back ExhaustHondata FlashPro w/ custom tuning (13.0 A/F)93 OctaneEverything else is OEM, the K20Z3 is a great engine and if you plan on only I/h/e with flashpro, it'll be more than enough to have fun with.Factory engine = 32.5 mpg (highway only), 31.9 (mostly highway, some city with the occasional 0-70 full throttle)I/H/E only = 35 mpg (highway only), 33.3 mpg (mostly highway, some city with the occasional 0-70 full throttle)Will update with new mpg after the FlashPro tune.
A**R
Love it. Truly one of the best intakes for the 8th gen Civic SI
This intake is worth every dollar. My car feels stronger, and all I have is this intake and a flashpro with a generic MAP+MAF tune.Can't wait to add a Q300 by invidia and a tune by Vitviper.Car numbers currently are 196whp, 150 lb-ft torque.
O**O
Honda si 2009
Already on.it look great.it sounds though.Hi quality,durable material i can tell already.A master piece from Skunk2.J35 throttle body compatible.✌
J**S
Love it
Great
R**A
Great power installation is a challenge but can be done
Great power installation is a challenge but can be done. Very low to the chassis might need modification for rain racing conditions.
A**R
Fit my 08 Honda Civic si
After installing this in my car. It made it louder more responsive. Well worth it.
J**F
Missing Brackets
Had to fabricate some old parts to make new ones. LOads more air.
R**O
Good product
Ease of installation
Trustpilot
3 weeks ago
4 days ago
