300cpsi GESI UHO catted downpipes for all Audi S6 RS6 S7 RS7 A8 S8 with 4.0 TFSI engine.
Our downpipes utilize OEM X-crossing design and have OEM-spec bottom flanges. Those downpipes will fit the factory exhaust or any performance cat-back system. 300cpsi GESI UHO made in Canada catalytic converters provides a significant improvement in exhaust flow over stock while keeping "check engine light" off. Well known on the market sport converters with perfect price/quality ratio.
You buy directly from the manufacturer and all the products 100% handmade in Russia.
We don't compromise on quality! No mild steel flanges, no weak clamp joints, no other cost reduction tricks.
Free flow is our priority! No steps and restrictive areas, only smooth transitions, bigger diameters, and optimized design.
Our welds and whole craftsmanship better than most of the competitors. Pictures speak for themselves.
5-year warranty against any defects given to the original owner.
Removing of factory catalytic converters will trigger a сheck engine light (can be eliminated with optionally O2 sensors restrictors). Firmware update recommended to get maximum performance gains.