SPEC BMW N55 B58 OEM Design Flywheels for 1M, 135i, M135i, M235i, M240i, 335i, 340i, 435i, 535i, Z4 35i
Unlock faster revs, sharper response and proven gains with the SPEC OEM design flywheel for BMW N55 and B58 engines. Available in billet aluminium at just 15 lbs and billet steel at 25 lbs, this performance flywheel has been a favourite upgrade for our BMW customers who want OEM fitment with real-world power and drivability benefits. We have installed and used these SPEC flywheels at Nforcd and customer feedback on quality, pedal feel and reliability has been consistently excellent.
Ideal for tuned or stock cars, this BMW performance flywheel is designed to work with an OEM clutch or OEM style clutch, including SPEC OEM-Design clutches for N55 and B58 platforms. It arrives ready to fit with the spigot bearing and dowels included for a straightforward installation.
Key features and benefits
- Proven gains: aluminium flywheel has produced up to 17 whp on an otherwise unmodified car, steel around 10 whp
- Choice of materials: billet aluminium 15 lbs for maximum response or billet steel 25 lbs for extra refinement
- OEM design and fitment for BMW N55 and B58 models across E82, E90, E92, F20, F21, F22, F23, F30, F31, F32, F33, F36, F10, F11 and more
- Includes spigot bearing and dowels for a complete installation
- Improved pedal feel with a more linear engagement when paired with an OEM or OEM style clutch
- Steel option further dampens gear resonance and is quieter at idle with the pedal out than aluminium
- Manufactured by SPEC with premium materials and precision machining
Which flywheel should I choose
Billet aluminium 15 lbs - the ultimate lightweight BMW flywheel for faster engine response and maximum performance. On our testing, it has delivered some of the highest wheel horsepower gains we have seen on a stock car at up to 17 whp.
Billet steel 25 lbs - the refined performance option that still delivers strong gains, around 10 whp, with extra damping to reduce gear resonance and idle noise compared to aluminium.
Compatibility
This SPEC OEM design flywheel fits the following BMW models and engines:
- M Series - E82 1M 2011-2012
- 1 Series - E82 E88 135i 3.0 N55 2011-2013, F20 F21 M135i 3.0 N55 2012+
- 2 Series - F22 F23 M235i(x) 3.0 N55 2012-2016, F22 F23 M240i(x) B58 2015-2017
- 3 Series - E90 E91 E92 E93 335i(x) 3.0 N55 2011-2013, F30 F31 335i(x) 3.0 N55 2012-2017, F30 F31 340i(x) B58 2015-2017
- 4 Series - F32 F33 F36 435i(x) 3.0 N55 2013-2017
- 5 Series - F10 F11 535i(x) 2011-2017
- X Series - F25 X3 2011-2017
- Z Series - E89 Z4 35i 2011-2016
Clutch compatibility
This SPEC designed flywheel is to be used with an OEM clutch or OEM style clutch. It is also designed to be installed with SPEC BMW N55 B58 OEM-Design clutches. For even higher performance levels and a more linear pedal feel, we recommend the SPEC design flywheel setup.
What is included
- SPEC OEM design flywheel in your chosen material
- Spigot bearing
- Dowels
Fitting and support
Professional fitting is recommended. Nforcd offers in-house installation and support in Warwickshire. Request a fitting quote by emailing Sales@nforcd.com.
Compatibility check before dispatch
To ensure perfect fitment, we run a compatibility check before shipping. Provide your UK registration number or the last 7 digits of your VIN at checkout and we will verify the correct application.
Manufactured by
SPEC
Warranty
Lifetime warranty.
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