TRE - 1.75" ( 3" & 8" Leg) Treadstone 45 Degree Aluminum Piping (AP17545)Treadstone Performance has introduced 45 Degree Aluminum Intercooler Mandrel Bend Piping. A new line up of quality universal aluminum bends for your Intercooler piping. In the past we have come across many manufactures and shops across the internet selling low grade Intercooler Piping, that either you can not weld because of the poor quality, have a clear coat on them which makes welding terrible, are easily scratched and dented because they are so