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FrankenTurbo
FrankenTurbo F650 Stage 2 Turbo
The definitive N55 Stage 2 turbocharger. Bolt-on 600+ WHP potential.
+150–250 WHP over stock
Professional install
SKU: FT-F650
$2,995USD
Listed atFrankenTurbo· direct from manufacturer
Stage 2-capable on FlexFuel (E30–E50)
OEM-core reliability with aftermarket output
Identical OEM spool feel below 3,000 RPM
Supports 500–650+ WHP with fueling upgrades
Drop-in fit — no fabrication required
Rebuilt to FrankenTurbo spec with 1-year warranty
Linked to the manufacturer · opens in a new tab · no markup
Compatible with 15 BMW N55 models. Includes F10 535i, F30 335i, F32 435i and all N55 platforms. /
The FrankenTurbo F650 is the most popular choice for N55 Stage 2 builds worldwide. Built on a remanufactured OEM core with a dramatically upgraded compressor wheel, the F650 delivers significantly more air mass than stock while retaining OEM spool characteristics. The result is a turbo that feels stock at low RPM but wakes up hard in the midrange — exactly what the N55 platform rewards. Proven across hundreds of N55 Stage 2 builds running MHD Stage 2+ FlexFuel.
Key highlights
Stage 2-capable on FlexFuel (E30–E50)
OEM-core reliability with aftermarket output
Identical OEM spool feel below 3,000 RPM
Supports 500–650+ WHP with fueling upgrades
Drop-in fit — no fabrication required
Rebuilt to FrankenTurbo spec with 1-year warranty