BMW N55 Engine Rebuilding & Repairing Services

Performance Rebuilt, Reliability Secured

Looking to get the most out of your N55 engine? Palenon Performance's professional engine rebuild service is the perfect way to restore performance, boost reliability, and even add serious power—without the cost of a full replacement. Whether you're refreshing a tired stock motor or building a high-horsepower setup, we offer tailored rebuild options to match your goals and budget.

Rebuilding your engine not only saves money, but also keeps your original engine block, ensuring perfect fitment and smoother integration with your vehicle. Plus, it’s a more eco-friendly choice.

From daily drivers to 1000+whp builds, we’ve got you covered—built right, built to last.

Experience expert craftsmanship in your next engine build—hand-assembled by Scott Martin.

Stock N55 Rebuild

Short Block – $3,900

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:

  • - Ring set
  • - Machine work
  • - Misc
  • - Bolts, bearings, rod bolts

Long Block – $4,900

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:

  • - Rear main seal
  • - OEM front main seal
  • - Valve cover gasket
  • - Oil pan gasket
  • - OEM head gasket
  • - OEM crank hub bolt
  • - OEM updated crank hub assembly
  • - Oil pan bolt set
  • - Oil pump bolt set
  • - HPFP oring
  • - Head bolt kit
  • - Vacuum pump gasket/seal
  • - Vacuum cover
  • - Injector decouplers/seals

Stage 2 – 900whp Reuild

Short Block – $6,900

Specifications:

  • - Manley forged 84.50mm pistons
  • - Manley forged H-beam rods
  • - ARP 2000 rod bolts
  • - 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
  • - Precision machine work by industry experts

Parts List:

  • - Rods/pistons
  • - Machine work
  • - Misc
  • - Bolts and bearings
  • - Inserts

Long Block – $9,900

Specifications:

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:

  • - Rear main seal
  • - OEM front main seal
  • - Valve cover gasket
  • - Oil pan gasket
  • - OEM head gasket
  • - Insane 1-piece crank hub
  • - Oil pan bolt set
  • - Oil pump bolt set
  • - HPFP oring
  • - Head stud kit
  • - Vacuum pump gasket/seal
  • - Vacuum cover
  • - Timing chain/guide kit
  • - Oil pump guide/chain kit
  • - Injector decouplers/seals

Stage 3 – 1000+whp Rebuild

Short Block – $8,900

Specifications:

  • - Fully built 8-bolt N55 shortblock (1000+ 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:

  • - Rods/pistons
  • - Machine work
  • - S55 Forged crankshaft
  • - Bolts and bearings
  • - Inserts
  • - Epoxy

Long Block – $11,900

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:

  • - Rear main seal
  • - OEM front main seal
  • - Valve cover gasket
  • - Oil pan gasket
  • - OEM head gasket
  • - Insane 1-piece crank hub
  • - Oil pan bolt set
  • - Oil pump bolt set
  • - HPFP oring
  • - Head stud kit
  • - Vacuum pump gasket/seal
  • - Vacuum cover
  • - Timing chain/guide kit
  • - Oil pump guide/chain kit
  • - Injector decouplers/seals

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

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