Crank hub failure is one of the most reported issues that plague the S55 engine. When your crank hub "slips" or "spins" it will cause your engine to skip timing, which can potentially cause catastrophic engine and valvetrain damage. The Speed Logic 4 pin crank hub features a keyed timing sprocket hub assembly, along with a 4 pin oil pump sprocket that will lock into the nose of your crankshaft. This is a significant upgrade over the stock design which relies on friction alone to keep the engine in time.
Speed Logic highly recommends this crank hub upgrade only be installed by a trained professional technician. Specialty tools are required to complete this installation. Improper installation can result in permanent engine damage.
For installations at our Southern California facility please contact (888)564-4215 or info@speedlogic.com to schedule your appointment.
Proudly made and machined in the USA
Kit includes:
- Crank Hub Timing Assembly
- 4 Pin Oil Pump Sprocket
- OEM Crank Bolt
- Specialty Drill Bit
- Drill Fixture Tool
- Drill Fixture Bolt
Fitment:
- 2015-2019 BMW M3 (F80 Chassis)
- 2015-2020 BMW M4 (F82 F83 Chassis)
- 2017-2021 BMW M2 Competition (F87 Chassis)