Thats because the really good systems use varying size of tube and they spent money figuring it out.. so they probably would not tell even if they did have one to measure.
Type of bends is way more important than tube size assuming nothing crazy..
Dave __________________
Dave - PDX
1995 318ti - Active Black and Tan.
2005 330xi - Mtech 1 - 6spd - Orient Blue/Black |