K&N Cold Air Intake System: High-Flow Air-Filter

I purchased this for my ’05 Avalanche 5.3L. As stated on the page it was very easy to install. I think it took me a little less than the 90 minutes stated in the instructions. I noticed an immediate increase in the amount of get up on the highway. I also have a Gibson Dual Extreme Exhaust system on my truck and on the highway it you give it a little gas the roar from the intake completely drowns out the exhaust. I haven’t put enough gas through it yet to speak to any mpg increase but I reset my mpg monitor on my truck when I installed it and it does seem to have gone up. Although so far for the first week I’ve had it installed I’ve been to into the gas to help my mpg :). I totally recommend this to anyone looking for a quick increase in hp and a little noise to boot. One piece of advice be careful when you are attaching the Mass Airflow Sensor to the mounting plate. The MAS is made of a plastic housing so the screws never really get tight. I had to watch carefully while tightening to make sure I didn’t crack it.

Love it. Sounds good when you press on it has a little whistle to it. My 5.3 loves to breathe better.

Wow is this kit cool. I was already aware of the K&N benefits having purchased replacement filters for my other vehicles. This time I decided to try this entire replacement kit on my 2005 Chevrolet Silverado with a 5.3 liter V-8. Note that I also installed a Flowmaster exhaust system as well. Man, this baby not only looks bad_ss but performs amazing. It installed very easily in aprox. 45 minutes. I took my time and was not rushing anything. When I fired up my truck it thanked me right away. You could hear how happy it was to breath freely. I have a nice increase in horsepower and torque. I don’t know exactly how much but I can feel the difference. I accidentally burned a little rubber.

Instructions are pretty basic, so definitely watch a couple YouTube vids first to make sure you’re prepared. Hardest thing to get around was the mass air sensor harness; there’s a tricky little security clip you have to remove first before the wiring comes off. Other than that, it’s a pretty straight forward install, and the results were 100% worth the price. I put this on a 6.0 vortec and the added power was immediately noticeable even at lower speeds. It also added a distinct rumble at 3000+ RPMs – I’m having a hard time not throwing the pedal down! Great no-brainer addition to your truck whether it’s a daily or project car.

Fit my truck perfectly, easy to install, very good quality, highly recommended and would buy again.

I have an 06 Sierra with the 5.3 liter also. Truck is a crew cab. The installation was easy and quick. The thing I noticed right away was the difference in power and response on acceleration. I had heard that the engine runs a bit louder, but that is only when you put your foot in it. I have heard some say that the transmission shifts smoother also, and I found the same to be true with mine.

I was expecting a little bit better gas mileage from what others have said. I also replaced my spark plugs with NGK iridiums and MSD spark plug wires. I have noticed an increase in gas mileage, but not the 2 MPGs listed earlier. I have only had this on for about 2-3 weeks, so maybe I need more observation time. I think right now I’m probably getting about 1/2 to 1 additional MPG with the cold air intake, spark plugs, and wires.

I have now been using this for about 2 years. There is an increase in mpg. I would guess that it is about 1 mpg in the city and maybe 2 on the highway. I have noticed with my truck that the octane of the gas makes the most difference though. With this filter and 93 octane I can get about 22 mpg if I stay at 65 or below. I did just make a trip where I averaged 70-75mph and my mpg averaged about 21.5 (with 4 adults in the truck). Not too bad for a full size truck.