The Final Word
The K&N Series-77 system freed up 8 horsepower on the Silverado, and when the go pedal is mashed, you can hear the difference. Because the filter can be serviced, you shouldn't have to buy another one for as long as you own the truck. So, if you have a few hundred bucks and about an hour, you too can have more power on tap.

SOURCE
K&N Engineering Inc
1455 Citrus Ave
Riverside
CA  92502
Dept. OR