The B46 and B48 two litre four is fitted across the F3x and G-series cars. This article covers the front-mount intake, airflow meter position, heat soak, silicone connections and front panel clearance.
On the G20 330i and G30 520i and 530i the intercooler and the charge path have to be planned together. This piece covers core and end tank design, silicone joints, custom intercooler work and testing.
The S55 charge pipe fails at the joint, not in the middle of a straight run. This article explains the metal and silicone split in a proper replacement, hose selection, clamp details and fitment on the F8X.
On the E82 135i and E90, E92 and E93 335i the parts around the N54 and N55 have aged more than the engines. This piece covers the charge pipe, intercooler, downpipe and silicone work worth doing.
The B58 appears in the G20, G30 and M240i with a similar charge path and different packaging. This article covers the titanium charge pipe, the front-mount intake and the cooling choices on these cars.
Moving from a saloon to the X5M F95 or X6M F96 changes the intake layout completely. This piece covers carbon intake fitment, S63 downpipes, cooling in a taller nose and the M60i and XM variants.
The X3M F97 and X4M F98 use the S58 engine in a very different engine bay. Here is what changes for a dry carbon intake, what to check on titanium downpipes and how to confirm clearance before ordering.
The F90 M5 and M8 family share a front end that is short on space. This article explains the two-branch intake layout, charge cooling, the S63 exhaust side and the fitment details that decide the job.
