I was looking at another pipe set up on my sporty ...... V&H Short shots and was told it would cause me valve trouble down the road . is this true or another misleading myth ? i have a 03 1200 . i know ill lose some back presure going to a more free flowing pipe . and i like the sound of them , what are the pros and cons to a set up like this ? im running Screaming Eagle II slip on and SE stage II air filter at this time ....... thanks for the help !!!!!!