E21 M20 System (323i only)

Our T304 stainless steel E21 M20 exhaust system is based upon BMW’s 3 box, 323i system and using the same 42.5mm pipe work, so it is not only compatible with our manifold set, but also with the factory down pipes. Due to improved box design, our system offers a 21% increase in flow capability, when compared to the factory original.

* Our system is not compatible with Alpina’s enlarged rear differential cover – although we can modify if requested.