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Insane Performance

BMW N55 & S55 4-Pin One-Piece Crank Hub Upgrade Kit

BMW N55 & S55 4-Pin One-Piece Crank Hub Upgrade Kit

£780.00 GBP
£780.00 GBP £780.00 GBP
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Fixes crank hub slip on N55 and S55 engines - the root cause of timing drift, misfires and potential engine damage. This one-piece, keyed 4-pin hub replaces the fragile OEM two-piece design with heat-hardened, cemented special steel.

  • Includes hub & pulley, drill adapter, special drill, hub puller, OEM-spec main bolt and 8 reinforced pulley bolts
  • Full instructions supplied - designed for confident DIY fitters on fast road or track day builds
  • Proven under stage 1, stage 2 and hybrid turbo setups; handles remaps, downpipes and spirited driving
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