Here's what I just made for a customer. He wanted something that he could use with his night vision and no headlight night time riding on his beat XR650r. With the removal of 2 bolts the second muffler slips off and the FMF Q4 in unmolested, just drop the SA back in! You can barley hear this bike run!! He likes it so much that he has been leaving it on all the time. The power is robbed a little on top. Any questions, let me know...
