BMW S55 Engine Rebuilding & Repairing Services

Performance Rebuilt, Reliability Secured

The BMW S55, found in the F80 M3, F82/F83 M4, and M2 Competition/CS, is one of BMW’s most capable performance engines. Whether you want to restore factory performance or push beyond 1200+ whp, a proper rebuild makes all the difference.

At Palenon Performance, we specialize in precision S55 engine rebuilding. Every build is handled with attention to detail—from OEM-spec stock restorations to fully forged high-horsepower setups. We use proven parts, strict machining standards, and expert assembly practices to ensure your engine delivers the performance and reliability you expect.

Our goal is simple: give you an engine that feels brand new, or one that’s ready to handle extreme power with confidence. With our experience and dedication, you can trust us to build your S55 the right way—whether it’s for the street, track, or drag strip.

Take your engine to the next level with the craftsmanship of Scott Martin.

Stock S55 Rebuild

Short Block – $7,500

Specifications:

  • - Stock: pistons and rods fully reusable
  • - Block: cleaned, decked, honed
  • - Machined with torque plate, measured, and in-spec
  • - Crankshaft polished
  • - All new piston rings (properly gapped to fix OEM issue)
  • - All new King bearings
  • - All new bolts
  • - Machine work performed by one of the top shops in the nation

Parts List:

  • - Piston rings
  • - Rod bolts
  • - Machine work
  • - Misc
  • - ACL main bearings
  • - ACL rod bearings
  • - Bedplate bolt set

Long Block – $9,500

Specifications:

Includes all Short Block work, plus

  • - New OEM head bolts
  • - New updated crank hub
  • - Brand new OEM head gasket
  • - All new gaskets and seals
  • - Full assembly from valve cover to oil pan

Parts List:

  • - Valve cover gasket
  • - Vacuum pump seal
  • - Oil pump tension seal
  • - Front seal
  • - Rear seal
  • - Oil pan bolt set
  • - Oil pan gasket
  • - OEM head gasket
  • - Crank hub assembly
  • - Crank hub bolt
  • - Oil pump/suction plate bolt set
  • - OEM head bolt set
  • - Injector seals
  • - Injector decouplers

1200+whp Rebuild

Short Block – $12,500

Specifications:

  • - Fully built 8-bolt shortblock (1200+ hp rated)
  • - Manley forged 84.50mm pistons
  • - Manley forged H-beam rods
  • - ARP 2000 rod bolts
  • - Epoxy closed deck reinforcement
  • - Upgraded head studs (4 corners to 11mm with NS300L inserts)
  • - Crankshaft 2-pinned for Insane 1-piece crank hub
  • - Block: cleaned, decked, honed
  • - Machined with torque plate, measured, and in-spec
  • - Crankshaft polished
  • - All new King bearings and bolts
  • - OEM twin-turbo coolant passages remain usable

Parts List:

  • - CP Carillo forged pistons
  • - CP Carillo forged rods
  • - Machine work
  • - Misc
  • - ACL main bearings
  • - ACL rod bearings
  • - Bedplate bolt set

Long Block – $13,900

Specification:

Includes all Short Block work, plus

  • - New ARP head studs (all 11mm)
  • - New one-piece Insane crank hub
  • - Brand new OEM head gasket
  • - All new gaskets and seals
  • - New timing chain and guides
  • - New oil pump chain and guides
  • - Head drilled for larger corner studs
  • - Full assembly from valve cover to oil pan

Parts List:

  • - Valve cover gasket
  • - Vacuum pump seal
  • - Oil pump tension seal
  • - Front seal
  • - Rear seal
  • - Oil pan bolt set
  • - Oil pan gasket
  • - OEM head gasket
  • - Injector decouplers
  • - Injector seals
  • - Oil pump/suction plate bolt set
  • - Insane 1 piece crank hub
  • - 625+ head studs

Thank you for your understanding and cooperation. 🤟🏻👇🏻

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