Originally Posted by BLM

You are correct. It seems that with replacing the stock tubes and air filter with a drop-in you can gain around 8 whp. True the stillen CAI gains 17.5 at the top, but the install/filter cleaning requires bumper removal (not a big deal) as well as some dremel work on the core support (install). Many people on here are going with just hoses and drop-ins as their intake mod as the stock set-up is already pretty efficient. I think I may do the same. And you save at least $300 in the process.