Rode my yz 250f Sunday with Arrow silencer attached to my old DSP sx headpipe. Wow! I had ditched the DSP sa for being too loud and have been riding for quite a while with the stock silencer grafted onto the DSP sx headpipe which cost some of the power increase I had acheived from going to after marke exhaust in the first place. The Arrow not only gave back all the power gains but is much quieter than even the stock silencer at low to mid rpm. At high rpm it gets loud but with a cool mellow tone. Workmanship is good (not great) and the fit is acceptable (again not great) if you loosely attach the mid pipe first (It's a 3 pc system now with springs holding the silencer to the mid pipe), then install the head pipe tightly and the silencer last. I'll post a pic later.
