I bought the $25.99 air intake for my 97 Jimmy over a year ago and found it to be garbage. I should have known better but the factory intake was cracked and causing me problems. Well the aftermarket was worse. You could hear it on heavy acceleration but as far as a gain of any kind goes; I didn't notice anything. Besides I had to tighten all of the hose clamps once a week because it kept coming apart under the hood.