N52 3-Stage intake manifold kit

Enhancing the apex of BMW naturally aspirated straight 6.

When designing the N52, BMW last 6 cylinder naturally aspirated engine, the engineers went with the pinnacle of N/A technology.
Featuring Valve valve lift (valvetronic) and a special ram air intake manifold with variable stages, the N52B30 was offered with up to 260hp.

Unfortunately, BMW decided that was too good for us, and in the shadow of the N54 turbo engine and 35i models, they opted to save cost on most N52B30 models by downgrading to a non-active manifold, reducing the power to only up to 218hp in the best cases...

We offer the manifold, either sourced as a new part with a 2 year warranty, or as a used parts, with a 3 months warranty.

How does it work ?

As the name implies, the manifold has 3 modes for controlling the airflow routing. In combination with valvetronic, which allow for the throttle body to stay fully open with the less pressure drop, the power is maximized across the rev range in a way that is very unusual for a N/A engine.

At low RPM, the in take manifold operate just as any manifold would, the air is split, in a 1-2-6 fashion and mixed with fuel at the valves. Note that both cylinder banks are separated by the 2nd disa valve which is CLOSED

In the mid RPM range, the first DISA valve opens for the resonance tube. The RAM effect generated from the intake valve closing is resonated thru the pipe, pushing air at an higher pressure into the next cylinder in the firing order, greatly increasing the filling of the cylinder.

At the higher rev range, both DISA opens, allowing for the maximum of RAM effect and cross flow between cylinders. Peak power is achieved then.

This is even more obvious in the dyno sheet, as you see the 3 distinctive peaks of each range.