We modify the OEM Rs4 manifold.
It is then manufactured the same way as the org. with aluminium cast.
Advantages over the org Rs4:
- Higher passage due to larger and improved channel routing.
- Constant narrowing of the cross section.
- Larger modified collector.
- The fuel injector is placed to allow a better flow and therefore a better fuel mixture.
- Optional selectable for Rs4 or Rs6 throttle. (We also offer a compatible aluminium cast Y for Rs6)