Gonna make the jump to kooks 17/8 long tubes with cats. Going to do the install with friend that is a pretty good wrench to save on costs. Price of just the dyno tune is very reasonable this place gets great reviews. But don't want to pay the 400-500 for install and they talking 2000 to purchase headers (found on ebay for a touch under 1700 free shipping. Just wondering if there is any thing to watch out for like a heads up on trouble spots. Do you have to pull motor mounts etc. Install says 5-7 hours is that right on a new car with only 4000 miles on it. I figured it would be somewhat easy.