Airaid 450-260 Intake System

I expected some increased hp and throttle response with a CAI, especially at 40-50 mph... where the benefit really kicks in. I have had CAI on my last 3 cars, and thought I knew what I was buying... The two things I did NOT expect: 1) the fact that instead of kicking in once a while on a rainy day my traction control engages just about every time the turbos spool while I take a corner hard... and now- even with AWD, I can turn off the traction control and spin all 4 tires from a dead stop and while taking a fast corner. 2) My average MPG over the last 2000 miles has been 20.9--- up from 19.7 in the (about) 5000 miles prior- and this is with all the extra heavy pedal work I've been doing in order to hear the growl it added and get the "drifting rush" through corners... Excellent product, detailed & easy to follow instructions, fast shipping, and about the best price on the internet! Get one.

2019 Ford Flex Limited Eccoboost 3.5L Dual Turbo Right off you’ll notice far less turbo lag. At 45mph the car just seems to sustains itself...don’t even have my foot on the accelerator! City mileage went up from around 16.9 to 18.6. Highway mileage went from 22.4 to 24.6. Although, I also installed a Hobbs Stainless Steel High Flow Oil filter and did an oil change at the same time. Bottom Line: Noticeable, Better Performance and Gas Mileage!

Beautiful sound and performance

I put this on my 2011 Ford Flex with EcoBoost. Haven't put it on a dyno but between this, removing the resonater and installing dual magnaflow mufflers I'm sure I added some HP.

The whole point of a cold air intake kit is to allow cold air to enter the fresh air tract. Instead, this kit uses an extremely short weatherstrip seal that doesn't seal properly against the hood allowing massive amounts of hot air to enter the engine. 3 years ago (around 2014), you could contact Airaid and get a taller weatherstrip seal. Sometime between then and now, their customer service dropped into the sewer. They will deny the existence of such a seal and claim that the airbox is not intended to seal against the hood. Yet, their own website advertises that the seal is supposed to seal against the hood! The heat soak/ingestion results in a severe power loss and the heat soak takes a lot of time to cool off especially at the track. At an ambient of 60F on the street, I can see intake air temps soar above 140F. At the drag strip, that intake air temp does not drop even close to ambient until you're almost at the 1/4 mile line doing above 100 mph. The filter seems more restrictive than paper, but the larger surface area tries to compensate. The air filter adapter doesn't seal flush against the air box and relies on that thick neoprene gasket for a proper seal (very poor design). The intake air temp sensor housing isn't designed properly either. I can clearly see the blue O-Ring seal exposed inside the air tube when the IAT is installed as per Airaid's instructions. I sprayed some water on the outside and saw it immediately seep into the airtube. I'm not sure how many users of the Airaid bothered to even check this. Also, the IAT is positioned at an odd angle so the stock harness can't even reach it! The best you will see from this is about 10 hp with the hood propped open on a chassis dyno. You'll need to use home made methods of sealing the airbox (pipe insulation, taller weatherstripping but good luck finding the taller weatherstripping) to maybe shed 0.10 seconds in the 1/4 mile ET, and that's on a SHO/MKS with all of the bolt-ons you can install, water/meth injection, and a 17 psi tune. Overall: 1/5 stars Looks cool under the hood if you have money to burn. Otherwise doesn't add any legitimate performance even on a tuned SHO. Terrible design, almost seems like idiots slapped together the design and sold it at a premium. Notice on the new Airaids for EcoBoost Mustangs, they seal the box with plexiglass... essentially converting a panel filter into a cone filter within the same airbox and snorkle design.