2016-2019 BMW 7 Series 4.4 Exhaust Manifold 8609284AI02

Also known as

Exhaust Header

Turbo Exhaust Manifold

Engine Exhaust Manifold

Cast Iron Manifold

Bank 1 Exhaust Manifold

Bank 2 Exhaust Manifold

What this part does

The exhaust manifold bolts directly to the engine cylinder head and collects combustion gases from multiple cylinders, routing them into the exhaust system and turbochargers. On the BMW 4.4L V8 engine, these manifolds are mounted inside the engine valley (the "hot V") to directly feed the twin turbochargers for optimal response.

Because they are subjected to extreme heat and rapid thermal cycling, exhaust manifolds can eventually warp, crack, or break their mounting studs over time. A failing or cracked manifold typically causes a noticeable ticking noise when the engine is started cold, which may quiet down as the metal expands. It can also lead to exhaust fumes entering the passenger cabin, oxygen sensor faults, and a loss of turbocharger boost pressure due to escaping exhaust gases.

Fits these vehicles

OEM and interchange numbers

8609284AI02

8609284

Before you order

When replacing an exhaust manifold on this engine platform, it is critical to use brand new multi-layer steel gaskets, replacement studs, and copper locking nuts. Reusing old hardware often leads to exhaust leaks and broken studs in the cylinder head. Because this manifold mounts directly to the turbocharger in the engine valley, you should also inspect the turbo mounting flanges and replace the sealing rings that connect the manifold to the turbo housing.