Features of Note:
- The stock downpipe (bottom) is obviously much smaller than the ATR downpipe (top)
- The ATR pipe has very smooth bends, in addition to being 3" in diameter
- The wastegate is attached to the ATR pipe
- The smaller tube takes the output from the wastegate and routes it back into the exhaust
- The wastegate is a generation II or later ATR wastegate
- The stocker is designed to mate to a "doughnut" style gasket on a cast iron elbow, while the ATR has a smooth 3" mandrel bent curve with the gate mounted externally
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