J-Tubes 38mm with flanges, Stainless Steel Type1J Tubes 38mm with flanges, Stainless Steel Per pair These J tubes are an alternative for the already existing metallic J tubes and they can be used to replace the heat exchangers. We give you the opportunity to compose the exhaust yourselves and therefore we have both systems available. One with standard clips and another model with fixed flanges. The J tubes are delivered a pair, seals and assembly material included.