SPEC SB53S-3 Steel Flywheel for 09-13 BMW 335i/335is E9X N54/N55

Vehicle Fitment

• 2009-2013 BMW 335i (E90/E92/E93, N54/N55 3.0L, 6-bolt crank)
• 2011-2013 BMW 335is (E92/E93, N54 3.0L, 6-bolt crank)

Features

• Heavy-duty steel single-mass flywheel for enhanced durability
• CNC-machined profile for accurate balance and smooth engagement
• Optimized rotational mass for enhanced throttle response vs OEM dual-mass
• Designed to work specifically with SPEC SB53x-2 clutch series
• Provides consistent power transfer for street and light track use
• Improved reliability under higher torque loads
• Balanced to minimize vibration and driveline harshness
• Ideal for performance engines and upgraded drivetrains

Specifications

• Manufacturer Part Number: SB53S-3
• Material: High-strength steel single-mass construction
• Weight: Approx. 20-22 lbs (heavier than aluminum versions)
• Engine Compatibility: N54 and N55 3.0L turbocharged inline-6
• Crank Type: 6-bolt crankshaft configuration
• Balance: Precision CNC balanced for smooth operation
• Design: Single-mass for consistent engagement

Included Components

• 1x SPEC SB53S-3 steel single-mass flywheel

Product Description

The SPEC SB53S-3 Steel Flywheel is a robust single-mass performance flywheel engineered for 2009-2013 BMW 335i and 2011-2013 335is models with N54 or N55 3.0-liter turbocharged inline-6 engines and a 6-bolt crankshaft. Its high-strength steel construction delivers increased durability over some lighter materials while still providing reduced rotational inertia compared to OEM dual-mass designs. This translates to improved throttle response, sharper acceleration feel, and more direct power transfer - making it an excellent upgrade for spirited street use or occasional track days.

Precision CNC machining ensures this flywheel is balanced for smooth engagement and consistent performance even under higher torque conditions. Designed specifically to be paired with SPEC SB53x-2 clutch kits, the SB53S-3 offers reliable engagement and durability when matched to performance clutch systems. Whether you're building a high-output N54/N55 engine or replacing a worn flywheel during a clutch upgrade, this steel single-mass flywheel brings dependable performance and enhanced drivability to your E9X BMW.