Merge collector 3 cylindrar straight steel Steel exhaust manifold merge collector of the highest quality! Made of seamless 42.4x2.6mm tubes that are washed after cutting and then coal-blasted to get a clean surface for the best conditions to get a good TIG weld both internally and externally, All collectors are cut and conedto a smooth finish that works to form into most exhaust flanges in the market. The length of the tubes is about 125-130mm. Swedish made with the best quality on both pipes and manufacturing equipment!