Return HDR150 Fits 3W 120, 140, 150, 157, 170 Drop: 3.75"Run: 4.00"Dia: 1.00" / 25mm Price : $138.00 Quantity : **Add To Cart Straight Aluminum Header Fits 120, 140, 150, 157   Drop is measured from the face of the flange at the mounting bolt centerline to the centerline of the output tube Run is measured from the center of the exhaust port to the end of the output tube Run can vary across batches as much as +/- 0.25" Drop can vary across batches as much as +/- 0.125" Specifications D Drop 3.75" R Run 4.00" OD Output Diameter 1.00" / 25mm   Angled Flange YES   Weight Each 3.20 Oz     Specifications Subject To Change Without Notice