Downpipe FOR BMW 3 series N20 & N26 120i/128i/228i/320i/328i/428i/F20/F21/ F22/F30/F32/F33 2.0T

Top Tuning Technical requirement :

1: All materials are stainless steel 304, and wall thickness 1.5mm.
2: All flanges must be leveled after welding. The welding seam should not be larger than 0.3mm.
3: Surface brushed or polished treatment.
4: The inside of the finished pipe must be ensured that there is no oil, burrs and dust.