When it comes to venting and porting, Drum Os gives you plenty of options. Its easy to get creative with Drum Os because there are endless design possibilities. Drum O's come in 2, 4 & 6-inch diameters!
Also each size is available in 8 great colors, including Black, White, Chrome & Brass, in addition, there are 4 new Chrome colors Red, Blue, Green & Purple.
