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1 of 1 found the following review helpful:
Very Pleased Jul 15, 2007 I installed the K&N77 in a 2005 GMC Serria and I noticed an instant increase in horsepower. Acceleration is better and I have noticed that towing is better. Engine noise is louder when accelerating but it just sounds more powerful and goes away as soon as you stop accelerating. Installation was easy.
1 of 1 found the following review helpful:
Excellent!! Jan 03, 2007 This filter provided the very noticeable horsepower increase. Highly recommended it, much better MPG.
based on 2 reviews
