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Spec Clutch SB64A Aluminum Flywheel SFI Certified CNC Billet

(BMW X5 2001-05, 328i 1996-2000, Z4 2003-04, Z3 1998-2002, 325i 2001-05, 330i 2001-03, 528i 1997-2000, 330Ci 2001-03, 530i 2001-05, 325Ci 2001-06 + 7 more models)

Manufacturer

Picture for manufacturer Spec Clutch

Part Number

SB64A
6 reviews
Sale Price

$577.50

Estimated ship date Tuesday, November 24

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Product Details

The SPEC SB64A Aluminum Flywheel is a precision-engineered, SFI-certified billet flywheel designed to maximize clutch performance and drivetrain efficiency for street performance and racing applications. Machined from aircraft-quality billet aluminum — either 6061-T6 or 2024-T3 tempered aluminum — this flywheel delivers exceptional strength at the lightest possible weight.

Precision Manufacturing:

  • CNC machined to an industry-leading .001-inch tolerance — ten times tighter than the industry standard of .010
  • Guaranteed flat clutch seating surface for optimal disc bedding and holding power
  • True rotational balance eliminates harmful vibration and dimensional runout at high RPM
  • Carries full SFI certification for competitive and sanctioned racing environments

Aluminum Flywheel Advantages:

  • Typically half the weight of a comparable stock steel flywheel
  • Reduces rotating mass for faster engine revving and quicker throttle response
  • Features a replaceable 1/4-inch thick 1050 high-carbon alloy steel friction plate specially formulated for optimum clutch bedding and torque retention
  • Friction plate is secured with aerospace fasteners or stainless steel rivets for superior strength and corrosion resistance
  • Ring gear is pressed on, heat-treated, and secured with grade-10 fasteners for long-term durability
  • Rebuildable design extends service life

Flywheel Performance & Inertia:

  • Flywheel weight directly controls the moment of inertia (MOI), which affects the ratio of power to acceleration
  • Optimized MOI improves response based on gear ratio, vehicle weight, power output, and powerband characteristics
  • SPEC engineers each flywheel to specific dimensional and weight targets for street, drag, drift, road race, autocross, and rallye use

The SPEC SB64A aluminum flywheel is compatible with a factory-style clutch or any SPEC non-ratcheting clutch stage. Its rebuildable construction and replaceable friction plate make it a long-term performance investment for any high-performance build.

Products specifications

Fits

BMW X5 2001-05, 328i 1996-2000, Z4 2003-04, Z3 1998-2002, 325i 2001-05, 330i 2001-03, 528i 1997-2000, 330Ci 2001-03, 530i 2001-05, 325Ci 2001-06, 325xi 2001-05, 525i 2001, 330xi 2001-03, 323i 1999-2000, 323Ci 2000, 328is 1996-99, 328Ci 2000

FW Weight

10lbs

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Best prices around and fast shipping! A+

Great service with the best prices I could find online. I will be ordering from them again!

Fast shipping. Cheapest around hands down.

Best prices, fast shipping, and product as described. I would definitely recommend Autoplicity.

Super fast shipping, great price, and items arrived perfect.

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