N55 · F30

BMW 335i F30 — N55 Tuning Guide

Single-turbo simplicity, big midrange torque, and the easiest entry into BMW tuning.

Engine Overview

Displacement
3.0L I6
Stock power
300 hp
Stock torque
300 lb-ft
Induction
Single twin-scroll
Fuel
Direct injection
Redline
7,000 rpm

Stages & Expected Gains

StageHPTorqueRequirements
Stage 1+60–80 hp+80–110 lb-ft91+ octane
Stage 2+90–120 hp+120–150 lb-ftCatless DP + intake
Stage 3+150–180 hp+150–180 lb-ftE50 + meth or HPFP

Recommended Mods

Stage 1
  • Stock
  • 93 octane
Stage 2
  • Catless downpipe
  • Cold air intake
  • Charge pipe
Stage 3
  • Flex fuel
  • Methanol injection
  • Upgraded intercooler

Known Issues to Watch

Wastegate Rattle

Endemic to N55. Cosmetic, but loud — replace turbo if it bothers you.

Carbon Buildup

DI engine — walnut blast intake valves around 60–80k miles.

  • Wastegate rattle
  • Walnut blast intake valves at 80k

Compatible Platforms

MHDbootmod3JB4 (piggyback)

Ready to plan your F30?

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