Re: Glendale w/fredhead
I have the same pipe but mine came without a muffler. I have since added a muffler for street use but I do remove it if i go trail riding or the track.
My experience has been that the muffler cuts performance more then I like when I want to ride my bike hard.
As Tyler has said that pipe does add more top end. I cut and modified mine with a longer header to get a better balance between low and high.
Took me a while of cutting and welding different header lengths and tuning the carb for every change. But after a while I finally found the correct header length that worked for me.