Injen Power Flow Cold Air Intake
I have had the Injen Power Flow Cold Air Intake for about a month now and as far as I can tell there is no performance increase in mileage at all. The sound of it is great and it seems to have more torque and horsepower on the lower end. I say "seems" as the sound of the system may give the perception that torque and horsepower has increased. Installation was average at best as the instructions need to be updated. Workmanship and material appear to be topnotch. Recommendation: save your money.
2008 tundra 5.7 4x4
Pretty easy to install have really not noticed a increase in mpg. Nice fit and finish. I went with this kit because of the amsoil air filter. I live in a dusty environment and want the best protection. The sound it delivers on hard exelration is awesome !! I can feel a little improvement in midrange to top end. Low end seems same but smother off the line performance. It's very different from the other kits out there. I would use it again because of the excellent build quality and filter.
PROS: -Small increase to power -Small improvement to gas mileage -Great sound; not overpowering or excessive -IS CARB approved for CA residents CONS: -Needs a little improvement on installation fit -CARB sticker is hidden by heat sheild (painful for CA smog test) Overall I love the intake. Would recommend it especially for customers that need the CARB exemption (despite what the site says) Would be 5 stars if the cons were addressed.