There are two easy ways to help get more performance out of a turbocharged car.

That is making it easier for air to get in and easier for air to get out. On this new 10th generation Honda Civics the best place to start is with a performance cold air intake and downpipe. Both of these items are readily available, easy to install, and give some great bang for the buck.

Airbox _ MAF Cutaway.PNG

We designed our CAI to be a straight and easy to use drop in with no tuning required.

All the hardware and parts needed are included in the kit and this is the only cold air system on the market that will work on Canadain model cars with no alterations. In the Canadian model Civics, the windshield washer reservoir is located in the lower left front fender. This space is where the filter element for a typical cold air intake system is placed. Because of this, you cannot run a CAI on a CAD Civic unless you relocate the entire bottle and hose to the other side of the car. To help ease the pain and make for a seamless install we designed this kit to work with this in mind.

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Our downpipe uses an 80mm bellmouth opening which is the largest on the market.

Now, why is this important?

Turbochargers function a lot on pressure differences and the greater those deltas the easier our car can breathe.

It works like this.

As the car goes through the combustion process there is a huge increase in cylinder pressure, this is the force that acts on our piston and creates the work that it needs to make our engine move and make power. When the piston is on its way back up and the exhaust valves are open and all the spent gas that is still under pressure are exiting the port and going into our turbocharger to spin the turbine wheel. Once it is done doing work on the wheel the spent gases now need to exit the turbo and through our exhaust system as quickly and efficiently as possible.

So how can we aid in that evacuation of the spent gasses? The answer is by making the area behind the turbine wheel has low a pressure zone as possible encouraging the spent gases to move out quicker. We achieve this by using the large 3.125” exit and making the pressure delta as great as we can. So this is a case of bigger is better.


Manufacture: 27WON Performance

Part #: L15-6-209-10, L15-6-209-12, and L15-6-305-15210

Components: Hybrid Air box, high flow air filter element, cast stainless steel downpipe, 02 defouler, all calmps, brackets, and hardware


  • Billet Machined MAF

  • Clear Lexan Cover

  • 100% OEM fitment, no cutting or modding required

  • All OEM heat shields retained

  • Full T304 stainless steel components and hardware, will not rust

We complete our intake and downpipe install with the addition of our front-pipe under the car as well. By going to a larger size pipe we achieve the same goal as the down-pipe did and helped reduce back pressure in our exhaust system to allow for a more free-flowing set-up. This will help make sure the gases get out as quickly as possible.

While the OEM exhaust does a great job at supporting the stock turbocharger our new larger pipes will help make sure things continue to breath easy when we drop in our W1 turbo upgrade.


The OEM turbocharger studs are notorious for breaking off in the OEM turbine housing when installing an aftermarket down-pipe upgrade. When planning to the job we suggest applying penetrating oil at least 3 hours in advance to really let it soak in and help make removal easier.