We received a message asking about our line of Evolution for the Chevy Silverado, so we thought it would be a good idea to post a list here on the forum. Here you can also see the Horsepower and Torque gains for each.









If you have any questions about the Injen Technology Evolution air induction systems for the Chevy Silverado / Duramax then visit our website at The World's First Cold Air Intake System or message us here on the forum. We'll be happy to help you out anyway we can. Thanks!