Great but loud
I installed this CAI unit on my 013 Avalanche. I noticed an immediate difference in low end torque, which was lacking before. I also pull a 26 foot toy hauler and going uphill you can really hear the low roar of the intake. So much so it drowns out the radio. Other than that I would have given it 5 stars.
Instant results after the installation of my 63 Series. Noticing roughly a 2 mpg increase and a much better throttle response. Installation was very simple. Set up everything I could inside, went out to my truck and finished the installation, took no more than 45 minutes. By the way, it sounds great paired up with my Magna Flow exhaust!