Hmmm lets see... Yes, Dinan will warranty their parts if they are purchased new form a dealership. If you don't have confidence in your abilities to do mods yourself then plan to spend the $$ to let someone else do it for you. We are talking simple stuff here (So easy a Caveman can do it..). #2 - Barry, We are not talking about saving a few dollars but thousands. If you've got the cash to throw away then by all means go for it... I was just providing a cheaper performance alternative for a vehicle that is already out of factory warranty. I have under $1700 invested in my S2 package that Dinan will charge you $5,200 + intallation for. Hey - It's your money & choice so have fun making it.