RK Autowerks Forged S63TU4 – 2018+ M5 M8 X5M X6M



RK Autowerks Forged S63TU4 – Capable of handling 1500 hp:

  • Carrillo Rods with CARR bolts
  • CP Pistons
  • Micropolished crank with balanced rotating assembly
  • RK spec rod bearings
  • All new consumables (gaskets, seals, stretch bolts, etc)
  • Rebuilt oil pump
  • Port and polished heads (pictured in gallery) are available as an option.

Can be installed into the following vehicles:

  • M5 | F90 | 2018+
  • M8 | F91/F92/F93 | 2020+
  • X5M & X6M | G05/G06 | 2020+


Installation is available at our shop in Ft. Worth, TX.  Please see this link to add installation.


The forged S63TU4 will be shipped via freight and takes 7-10 days to arrive once picked up.  Engines can only be sent to a commercial address.

Core Deposits

  • $5000 – Refundable upon receipt of a usable core S63TU4

Warranty Info



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