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K&N is the inventor of the Air Intake System and has over 50 years of experience in the performance filtration industry. Proudly designed and manufactured in the USA, this premium cold air intake system is specifically designed for your vehicle and is dyno tested to provide a guaranteed increase in horsepower. It features a high flow intake tube, custom heat shield, and oversized K&N Washable High-Flow Cotton Air Filter for ultimate airflow. This Intake system replaces the restrictive OEM air box to provide an improved driving experience for daily driving or towing. It installs easily in about 60 minutes and is backed by a No-Hassle Lifetime Limited Warranty and will not void your factory warranty. Legal for use in all 50 states.
Compatible Vehicles:
- 2002-2005 CHEVROLET TrailBlazer
- 2002-2005 GMC Envoy
- 2002-2004 OLDSMOBILE Bravada
Matthew
Reviewed in the United States on August 25, 2023
Yes, I did notice a very slight gain in power after first gear. But it dramatically reduced my speed and power in first gear. I’m sure we have all ripped around a corner at a traffic light just before a wave of traffic comes through the intersection. Well, with this intake, I couldn’t get out of the way fast enough. First gear was so slow it was scary. I happened to look at the Dino graph they include in the box when I was uninstalling it from my car. Sure enough, testing was done only in second gear. This intake did little more than slow my car down at takeoff and make more noise. It didn’t even sound that good. Additionally, removing the resonator actually decreases performance. A resonator does more than just make the engine quieter. It also balances air pressure which increases performance.
Arthur
Reviewed in the United States on July 29, 2020
K&N intakes work great
Jeremy Rohdy
Reviewed in the United States on March 11, 2015
Installed this on my 2003 Envoy this weekend and couldn't be happier. There is an increase in top end power and at least a 1 mpg increase, pretty big deal when you are only getting 15 mpg to start with. The best part is the noise it makes when you get into the throttle and it starts really pulling in the air. My old man said that in the 70's, people flipped their air filter tops to achieve that performance car sound. I highly recommend this product.
Tucker Neighbors
Reviewed in the United States on July 30, 2014
Very easy to install. Love the throaty sound and is definitely a little quicker!
Steve
Reviewed in the United States on June 2, 2013
Was packaged properly. Received ahead of schedule. Easy to install.Worked as described.Raised MPG on town driving 1.5 to 2 mpg. Raised mpg on highway 2.0 to 25 mpg. Big change in horsepower,but if you like to hear the roar you are losing mpg !
Jet Lee
Reviewed in the United States on January 7, 2012
This will be my fourth K&N intake system for a car I own. I've always doubted all of them when purchasing, including this one. But they seem to always amaze me. The rush of power and the sound of cool forceful air screaming into the intake is phenomenal! I cannot help putting the pedal to the metal. Power can be felt in all RPM ranges, but when you floor it...man the power just climbs until the engine upshifts, then you do it all over again. I initially made my own intake system, but there were choke points and the K&N design just gets rid of all the restrictions while allowing big increase throughout the powerband. Amazing and quality product, I did not use the shroud included to protect the intake from engine heat as i've read it doesnt do a great job. I already fabricated my own shroud and it works great with this system. I felt the intake tube and filter after driving hard and it was even with the ambient temperature, so I did a decent job with keeping my cold air intake....cold. So I cannot comment on the the intake, but I am sure it keeps away engine heat somewhat. I recommend adding your own insulation to fully unlock your intake's potential. This totally woke up my straight six engine, along with my exhaust and engine tune. If you are thinking of buying...you wont regret it! You will only enjoy it.
Gavin B
Reviewed in the United States on August 1, 2011
First off, this will fit 02-05 Chevrolet Trailblazers, despite the "Make sure it fits" tells you it won't. Installation was pretty easy, the only this I would recommend is purchasing a small hose clamp to add to the crankcase vent tube (one doesn't come with the kit). Sound is pretty low key unless you really stomp on it, then it becomes very noticeable, and will certainly drown out your radio.The heat shield is really bare bones, though, and this intake still gets hot to the touch with the heat shield in place. I will probably hollow out the stock airbox to insulate the filter better, as the point of a cold air intake is to, well, intake COLD air. Knocked two stars off the product for that.
A. Kilger
Reviewed in the United States on July 28, 2011
I bought this product about a year ago from Amazon. I hooked it up in about an hour with few to no problems. I realize many of you don't like to read instructions, because neither do I, but I strongly recommend it in this case. If you don't follow them, you will miss important steps that are definitely needed to install the intake.There is no gain in gas mileage, so save your Benjamins if that's what you are looking for. As for horse power, I will say it makes a small difference, there is definitely performance to be had on the throttle response from the product.The most noticeable difference from this intake though is the sound. When you drive normally it will make no difference to the quietness of the vehicle. However, when you step on it a little more, or really floorboard it, it will be louder than your radio, that's for sure. It has a very distinct sound, and everyone that I know that has heard it really likes the sound it produces.I further recommend that you hollow the airbox and reattach it over the intake instead of the heat shield provided. It won't choke the intake and it will also help keep the air far cooler (which is the point of a cold air intake). If it sucks in too much hot air it will affect the timing and power.Great product, I give it 5 stars! I also prefer it over the metal intake of the same model because obviously plastic won't get as hot as metal, and help insulate the air.
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