Tailored for Audi RS6 C8 and Audi RS7 C8 with 4.0 TFSI engines, Milltek's downpipes feature a robust 3.15" (80.00mm) diameter, crafted from durable T304 stainless steel. These downpipes include precision TIG welds and a high-flow design, seamlessly connecting turbos to front pipes for enhanced perfo..