After some shopping around(most shops wanted about $750!), I installed the Hot Rods on my 05 GT yesterday myself. I am by no means a mechanic(the hardest I had ever done was a top end rebuild on a 2-stroke MX bike before this) and it took me and a friend about 6 hours from start to finish. I used a custom tune from Brenspeed and it runs strong, especially on the top end....and of course you can't beat that old school lope!