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Stage 2 is the hotter calibration for customers who want more out of the factory fuel system
Aftermarket exhaust system (for improved flow)
boost‑by‑gear
BMW E46 323i/328i
00–05 E46/Z3/E39/E83/E85 MS43 N/A Tune – Stage 1/2/3 N54 Stage 2 is the hotterBMW E46 E39 E83 E85 and Z3 with the M54 on MS43custom naturally aspirated ECU tuning by Poverty Built. Stage 1 (OEM+), Stage 2 (headers & intake), and Stage 3 (advanced boltons cams) deliver OEMsmooth drivability, sharper throttle response, and conservative, datadriven gains for street and track builds. Fits: 20002006 E46 325i 325xi 325Ci M54, MS43 20002004 E46 5 325ti M54, MS43 20002006 E46 330i 330xi 330Ci M54, MS43 20002004 E39 525i 530i M54, MS43