[rangoRT]

I bought a CAI mainly to increase air volume when towing. With a better flowing exhaust and some light engine modifications I went from 8.5mpg to 10mpg flat towing 2.5 tons. I imagine it did increase HP overall once the other modifications are factored in, including a custom SCT tune. The ability to go from 91 octane to 87 octane when towing is a definite bonus.

Don't forget that Euro vehicles don't have complex emissions systems on their vehicles as we have here on North American vehicles. Europeans are taxed on their vehicle emissions, which is why they often have much smaller engines in their vehicles. I'm sure if they tested an engine with decent displacement, their results will be more in favour of a CAI developing more HP.

When I had my land up north, it bothered me to know that the factory air intake opening was down around the lower bumper. This is not good for trail running as you can easily take in dirt, water, or a mix of the two. Raising the intake higher into the engine compartment was a no brainer.

I put on 40K miles on the original K&N air filter. It was beyong cleaning as the dirt was so embedded into the filter it wasn't worth my time to clean. I replaced it with an Amsoil cone filter and it's lasted me 40K. I use the air compressor to clean it twice a year and it looks in fantastic shape yet.