K & N Cold air intake, Does it work as advertised?

[Ruby Roo]

I have a 2017 GMC Yukon Denali XL, 6.2L engine. I put the K&N cold air intake on my 2008 GMC Sierra and noticed a big difference and love it, both gas mileage and power. My question is with the larger intake on the Yukon XL will the K&N system really make any difference?

 

[chicagofan00]

I put it on my Tahoe and the only difference I truly noticed was the increased growl of the engine under acceleration. Otherwise I saw no tangible MPG increase and the butt in the seat dyno didn’t really notice much.

There is a thread in the performance section where Black Bear did a performance comparison of a lot of the common CAI for these trucks. Might want to check that out.

 

[yesac]

It makes it pretty noisy, a little too much for my taste. I have the stainless steel one. Probably going to remove it and go back to factory.

 

[sumo]

no. Not enough for noticeable gains in hp or mpg by itself. You may feel it be slightly more responsive. With a tune it would make a difference.