v-twin manufacturing radii 2" side viper exhaust baffle 30-0103 v-twin manufacturing pipe baffle set fits inside straight pipes. baffles that are 2" denotes the size of the pipe into which they fit. baffle s are 4" long. set is easily installed by drilling a single hole onto the backside of the exhaust. sold in a quantity of 2. *baffle diameter denotes the size of the pipe into which it fits. **caution: these exhaust products are not legal for sale or use in california on pollution controlled vehicles. these products are intended for non-highway only. fits: custom application for straight pipes uom: 2 - pr size: 2 inch type: 4 inch 2011 catalog pages: 244, 597, 612, 886, 890 sav for harley davidson motorcycles