Audi S4/RS4 Cast Exhaust Manifolds

The new Wagner Tuning Audi S4 RS4 Evolution Exhaust Manifolds are a high performance redesign of the original factory manifolds. The original OEM log design reduced the exhaust gas flow path to a power robbing diameter! Our engineers have removed the OEM bottlenecks by using a 3 into 1 merged collector design allowing an unrestricted path from the engine to the turbochargers.This results in increased throttle response, quicker turbo spool-up, and higher top end power capabilities These manifolds are constructed using investment casting (lost wax). With this we achieve a very fine and detailed cast structure. The casting material (DIN 1.4848) is the same as used in the production of the VAG TFSI manifolds and turbocharger exhaust housings. Note: OEM Passenger Side Downpipe need to be Adjusted to fit