Joker,
I bought a pair of SM stock pipes on ebay last November for a dollar. I drilled a 3/4" hole through all the baffle plates after removing the last two completely. Yes, there is a significant improvement in performance by modifying stock pipes. If you look at aftermarket pipes, there is not much to them, and I think the head checker down at the walmart could figure out how to build some pipes. All we are trying to do is improve airflow. We can take a hammer and an old pipe and beat these pipes clean, improving airflow a great deal. It's all about the sound. I love my performance but want a deeper quieter sound. I'll find something I like eventually, but I only have 37,000 mile on her - so give me some time.
Ride Safe,
Dennis
