"The product was everything as I expected it to be. It was a little tricky to install but overall worth it. Not to mention the package was delivered the very next day that I placed my order!"
Fits all 2017-2021 Honda Civic Si 1.5T
Fits Honda Sensing Package
Canadian Models Require USDM Windshield Washer Reservoir Conversion (Supplied by Teknotik)
50 State Legal under CARB EO D-878-5
INSTALLATION:
PDF - 2016-2021 Honda Civic 1.5T Cobra Cold Air Intake System Install Instructions (Standard Bore)
Important Notes:
- NO CALIBRATION REQUIRED FOR SANDARD BORE MAF HOUSING
- TWO STEP PERFORMANCE "TSP" & PHEARABLE CALIBRATIONS COMPATIBLE BY SELECTING "RACE MAF" OPTION
- NOT COMPATIBLE WITH FACTORY CVT COOLER (SPAIN, TURKEY, ETC)
Technical Notes:
There’s a reason our Cobra Cold Air Intake Systems is a constant topic of discussion and so highly regarded. Our CNC machined billet aluminum MAF Housing was designed to provide *factory-spec fuel trims (-4% of factory STFT & LTFT) for optimal drivability and performance. The Cobra CAI utilizes a 4" volume from the air filter into the MAF Housing and is available with two different MAF housing choices; a Standard Bore housing and a Big Bore housing. Both housings utilizes the factory MAF sensor, but feature two different diameters and profiles. As mentioned above, the Standard Bore housing is designed to provide factory-spec fuel trims WITHOUT any tuning whatsoever. The Big Bore housing allows a 50% larger volume of air in comparison to the Standard Bore housing, which is why a tune IS required. This larger volume of airflow reduces pumping loss and creates an unrestricted air path to feed the MAF housing with ambient temperature air.
Customers can switch between MAF housings without having to buy another intake system by purchasing our MAF Housing Conversion Kit
Customers can convert to a Short Ram Intake with our Short Ram Intake Conversion Kit
Performance Gains:
- 15 horsepower and 12 ft/lb torque gains in comparison to stock with Standard Bore MAF housing WITHOUT TUNE - Read More Here!
- Larger gains to be seen at higher power levels with custom tuning
Third Party Testing:
Kit Includes:
- Standard Bore Cobra MAF Housing (Si)
- PRL Motorsports High Flow Oiled Cone Air Filter
- (1) 4-Ply Upper Silicone Intake Hose (Big Bore or Standard Bore)
- (1) 6-Ply Lower Silicone Intake Hose
- HDPE Rotomolded Lower Intake Tube
- (4) 304 Stainless Steel Worm Clamps
- Stainless Steel Mounting Brackets
- Stainless Steel Hardware
SILICONE IS ONLY AVAILABLE IN BLACK – UPPER HOSE IS DIFFERENT THAN OUR “STAGE 1” SILICONE

Above is a graph of the long term fuel trims with the stock intake w/ air box and factory ECU mapping, or in other words a bone-stock car.

Here is a graph of the long term fuel trims again with, but with our cold air intake (Standard Bore MAF) and factory ECU mapping.

This is another long term fuel trim graph, but with our cold air intake (Standard Bore MAF) and +6psi Hondata off-the-shelf map.
Notice how consistent and similar all of the LTFT graphs are. Each graph is within -4 LTFT.

Above is a graph of the short term fuel trims with stock intake w/ air box and factory ECU mapping (stock car).
Here is a short term fuel trim graph with our cold air intake (Standard Bore MAF) and factory ECU mapping.
This is another graph of the short term fuel trims with our cold air intake (Standard Bore MAF) and +6psi Hondata off-the-shelf map.
All of the STFT graphs display identical curves and consistency.
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Overall rating: 4.921875 / 5 from 64 reviews.
AI Generated Review Summary
The 2017-2021 Honda Civic Si 1.5T Cobra Cold Air Intake System is highly regarded for its exceptional quality, performance, and sound. Customers praise its top-notch quality, engineering, and the noticeable gains in horsepower and torque. The product is also noted for its fast shipping and the appealing look and smell of the intake.
Summary topics
- Product Quality: 13%
- Intake Performance: 21%
- Product Appearance: 11%
- Shipping Speed: 7%
- Product Sound: 48%
Review topics: ["fit","looks","quality","install","packaging","material","performance","issues","video","difference","shipping","car","sounds","intake","cai","turbo","prl","brackets","gains","bolt","ram","upgrade"].
Review highlights
- "Great Intake, Quality Parts, Solid Install" —
- "Really wakes up the throttle and of course the turbo now sounds amazing!" —
- "Turbo sounds amazing now, loud whooshes!" —
Reviews
Great Product!
"Went on easy. Looks great. Performs well. Materials and hoses are very thick and of high quality. Materials are an upgrade from factory hoses and box. Just feeling the thickness of the rubber and the plastics you can tell it is of high quality and will outlast the OEM Materials. The installation was pretty straight forward, lots of youtube videos to follow out there too. Only issue we had was depending on your year of civic the upper bracket will be flipped. Ours is a 2020 and had to flip down. Watch this, make sure bolts are hand tight when first getting it in to allow all of the bolts to seat properly on the hose. Also what is not included is a plastic wire tube (conduit) for you MAF connection wire. I would reccommend getting one and having it handy for cleanup at the end to protect and make your wires look clean at the end. A trip to harbor freight will solve this a bag of these is only a couple of bucks. Other than that, vehicle sounds great, hear the turbo spool and waste gate woosh at each shift, man that's a great sound. Love it."
"Super fast shipping, everything came in great!"
2020 honda civic si CAI
"Perfect fit. . easy to install. . California carb legal. . awesome sound 👌 extra power 💪. . I love my new prl CAI. . thank you prl. I Will shop PRL again in the future. . thank u PRL"
"The turbo sounds that come out of this thing are insane, I also feel extra gains from this intake. I highly recommend! I recently had a hks short ram intake installed and it threw codes and felt like loss of perfomance. PRL for the win!"
PRL Cobra Intake
"Absolutely love it, The quality is top notch and the install process is simple if you know what you’re doing. It definitely wakes the car up a lot and the intake turbo sounds are perfect, Will definitely be purchasing more PRL products in the future."
Best CAI
"This is by far the best cold air intake I’ve ever used!"
Prl CAI Cobra
"Sounds crazy😂"
2017-2021 Honda Civic Si 1. 5T Cobra Cold Air Intake System - Standard Bore
"Car sounds insane, actually noticed a power increase and boost increase"
Good quality
"Recently installed. Less than 1K miles on the air intake but so far i love the performance it brings and the additional fuel efficiency."
Q&A
- Does this come with the clutch line bracket?
- A clutch line bracket is not included
- Will this work on a 2019 civic touring?
- Greetings. No, you will need the Non-Si Version: https://prlmotorsports.com/products/2016-honda-civic-non-si-1-5t-cobra-cold-air-intake-system?_pos=8&_fid=a67c2bcf0&_ss=c
- Does it fit 2022 civic si
- It is not directly compatible, but can work with minor modification.
- Will this fit a honda civic si 2020 1.5t?
- Yes it will!
- Can I run the race without a tune? Or is it that big a difference.
- Unfrotunately no. The Race MAF requires a tune.