SPEC-Design Single Mass Flywheel for BMW E82 E90 N54 N55 — 135i, 335i and 335d
Upgrade your BMW N54 or N55 with the SPEC-Design single mass flywheel and feel the difference in throttle response, rev speed and drivability. This performance flywheel is designed for enthusiasts who want a lighter rotating assembly, higher rpm capability and greater clamp load levels from a non-SAC mechanism pressure plate. Built around SPEC’s billet, rebuildable architecture, this is a serious BMW flywheel upgrade for E82 135i, E90 335i and 335d owners who demand results.
Why choose this SPEC single mass flywheel
- Non-SAC pressure plate compatibility for higher clamp load and improved performance
- Lighter rotating mass for faster revs and sharper throttle response on N54 and N55 engines
- Billet rebuildable flywheel design with lightweight, low MOI characteristics
- Available in billet aluminium at 14 lbs and billet steel at 22 lbs
- Aluminium option produced one of the highest wheel hp gains we have seen at 17 whp on an otherwise unmodified car
- Steel option produced around 10 whp and dampens more gear resonance, making it quieter at idle with the pedal out than aluminium
We have used these SPEC flywheels on our own builds and our customers have been delighted with the sharper response and overall feel. If you are searching for a BMW N54 flywheel upgrade, BMW N55 flywheel, E82 135i flywheel, E90 335i flywheel or 335d single mass flywheel conversion, this SPEC-Design unit is a proven choice.
Material guidance — aluminium vs steel
- Billet aluminium — 14 lbs, maximum responsiveness and the highest recorded wheel horsepower gain in our experience at 17 whp
- Billet steel — 22 lbs, excellent drivability with greater resonance dampening for a quieter idle with the pedal out, approximately 10 whp gain
Important fitment notes
These kits feature a non-SAC mechanism pressure plate. Required for the install is a billet rebuildable flywheel that features a lightweight, low MOI design and infinite rebuildability.
Note: This product cannot be fitted to an OEM design.
You will also need the SPEC BMW Clutch (335i and 335d). If you would like advice on clutch pairing for your setup, contact us and we will be happy to help.
Vehicle compatibility
- BMW 135i 3.0L (N54) 2007–2009
- BMW 135i 3.0L (N54/N55) 2009–2012
- BMW 335i/335d 3.0L 2007–2009
- BMW 335i/335d 3.0L 2009–2012
Part numbers
- SB53S-2
- SB53A-2
- SB53S-3
- SB53A-3
Compatibility check before dispatch
We verify fitment before sending your order. Provide your registration number for UK vehicles or the last 7 digits of your VIN at checkout and we will run a compatibility check.
Manufacturer
SPEC
Professional fitting
We recommend professional installation. Nforcd offers in-house fitting in Warwickshire. Request a quote at Sales@nforcd.com.
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