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Spec Clutch SF50A-2 Billet Aluminum Flywheel SFI Certified

(2011 Ford Mustang GT)

Manufacturer

Picture for manufacturer Spec Clutch

Part Number

SF50A-2
13 reviews
Sale Price

$397.97

Estimated ship date Thursday, November 19

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Product Details

The Spec Clutch SF50A-2 is a billet aluminum flywheel precision-engineered for high-performance street and racing applications. Machined from aircraft-quality billet aluminum, this flywheel delivers significant weight savings over OEM cast steel units, reducing rotational mass for faster throttle response and quicker engine revs.

What sets SPEC flywheels apart is their industry-leading CNC manufacturing tolerance of .001 — ten times tighter than the industry standard of .010. This exceptional precision ensures a perfectly balanced assembly and a flawlessly flat friction surface for consistent clutch disc bedding, critical for both performance and safety in competitive environments.

Key Features:

  • Aircraft-quality billet aluminum construction for reduced rotational inertia and improved acceleration response
  • CNC machined to .001 tolerance — 10x tighter than the industry standard .010
  • SFI 1.1 certified for use in sanctioned racing and high-performance applications
  • Replaceable steel friction plate made from friction-enhancing steel formulated for optimal clutch bedding and holding power
  • Rebuildable design — the replaceable friction surface extends the service life of the flywheel
  • Optimized MOI (Moment of Inertia) engineered for maximum power delivery and drivability
  • Eliminates dimensional runout to prevent harmful vibrations and protect engine components

The flywheel plays three critical roles in the drivetrain: providing a consistent friction surface for the clutch disc, contributing the correct rotational inertia to match the vehicle's power and gearing, and maintaining true rotational balance at all RPM levels. SPEC engineers each flywheel with application-specific dimensions and weight targets to optimize MOI for real-world performance gains.

The SF50A-2 is a rebuildable unit featuring a 9-bolt pressure plate pattern and is compatible with SPEC single disc clutch kits. It is an ideal upgrade over OEM cast flywheels for street performance, drag racing, autocross, and track use.

Products specifications

Fits

2011 Ford Mustang GT

Good prices.

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So far, so good. Right part, fit perfect. What's else can a man ask?

Smooth

Ordered Borla headers 17216 that was lowest price on internet. Shipped fast at a fair price and arrived in good condition. Communication from Autoplicity was timley and accurate with tracking number. I would not hesitate to order from them again.

Great!

I was asked if the product I was purchasing was needed by a specific date in order to complete a project on time. Autoplicity responded and had the product to me a day earlier than I asked for without additional cost to me. I will order from them again.

Very easy process and great prices. Will be back to shop again. Thanks..... Cliff

Fast shipping, product was excellent .

It was helpful and I could navigate easy . Good parts , crazy shipping prices but it's german cars and I got it fast so no complaints here.

simple quick and easy

good and fast

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