Lots of stuff, 4" & 3", intake, boots, compressor elbow, etc.
4" 90* hard rubber elbow $25, 4" 45* hard rubber elbow $25, 2 3" 90* hard rubber elbows $20ea, oem 4bta intake elbow $45, 4" compressor outlet elbow fits HX30/HX35/ S300, $50, 3" soft rubber elbow $15, steel 90* tube 14" long $30, OR...