CXRacing Downpipe for 240sx S13 S14 S15 RB20 RB20DET RB25 Skyline Turbo Downpipe for Nissan S13 S14 S15 240SX with RB20 or RB25 Engine Swap. 304 Stainless Steel Dual Pipes 3" Main Pipe Connects to Stock Turbo Elbow pipe and Cat High Quality Downpipe, Big Performance Gain.