Insane Performance 4-Pin One Piece Crank Hub Upgrade Kit for BMW N55 and S55 Engines
Eliminate crank hub slip and protect your BMW N55 or S55 engine with the Insane Performance 4-pin one piece crank hub upgrade kit. This keyed crank hub solution is designed to fix the well-known S55 and N55 crank hub issue on tuned and hard-driven cars. Perfect for F80 M3, F82 M4, F87 M2 Competition, E82 135i, F22 M235i, F30 335i, F32 435i and more, this robust upgrade provides reliable timing stability under high torque, aggressive mapping and track use.
If you are running stage 1, stage 2 or hybrid turbos and want a real S55 crank hub fix or N55 crank hub fix, this is the must-have upgrade. Developed, installed and used by enthusiasts, tested in everyday city driving, high-speed motorway runs and even Nürburgring sessions for 50k+ miles without issues. At Nforcd we have fitted and used this kit on multiple customer builds with excellent results and outstanding feedback.
Why upgrade your BMW crank hub
- Prevents crank hub slip and spun crank hub on N55 and S55 engines
- Locks timing stability for tuned and track-driven cars
- Ideal for F80 M3, F82 M4, F87 M2 Competition, F22 M235i, F30 335i, F32 435i and more
- Engine-safe solution when increasing torque with remaps, downpipes and turbos
- Excellent price-to-quality ratio compared with costly alternatives
Proven performance and reliability
This 4-pin one piece crank hub was developed after repeated stock hub problems seen on stage 2 S55 builds. We evaluated the market and engineered a wallet-friendly yet robust keyed solution. With real-world testing across city, motorway and Nürburgring conditions and 50k+ miles logged, customers report zero issues and rock-solid timing performance. It is the dependable S55 and N55 crank hub upgrade you can install with confidence.
Key features
- One piece 4-pin keyed crank hub design for maximum anti-slip security
- Materials: special steel for strength and durability
- Surface wear treatment: heat hardened and cemented for long life
- Engineered for tuned N55 and S55 applications including track use
- Tested extensively with outstanding customer satisfaction
What’s included
- Insane Performance 4-pin crankshaft pulley and hub
- Drill adapter
- Special drill
- Drill adapter bolt
- New OEM main crank hub bolt
- 8 reinforced pulley bolts
- 4-pin hub puller
- Instruction manual
Compatibility
Designed for BMW N55 and S55 engines, including but not limited to:
- 1 Series: E82 135i, E88 135i, F20/F21 M135i
- 2 Series: F22/F23 M235i, F87 M2 N55, F87 M2 Competition and M2 CS S55
- 3 Series: E9x 335i N55, F30/F31 335i
- 4 Series: F32/F33/F36 435i, F82/F83 M4
- 5 Series: F10/F11 535i
- 6 Series: F12/F13/F06 640i
- 7 Series: F01/F02 740i and 740Li N55
- X Series: F16 X6 35i
- Z Series: E89 Z4 35i and 35is
If you are unsure about fitment, we offer a compatibility check prior to dispatch. Provide your UK registration or last 7 of VIN at checkout and we will verify the part fits your vehicle.
Fitting and installation
Professional installation is strongly recommended due to the precision required when pinning and timing the engine. For expert fitting, book with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
Manufactured by
Insane Performance
Common search terms
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