Thinking about going with the slip on Term for my new 848. Guess it comes with an ecu and needs to get tuned? My question is, is it worth the what, 1600-1800. I guess I cant do the work because it needs to get tuned etc? Does it run much better and any HP gains. Its an 2010 848. God I love it. Did the first Mtn trip today 260 miles. Thanks for any info.