SPEC GM F40 Aluminum Flywheel is a application-specific flywheels engineered for performance manual-transmission applications. It is selected by the complete vehicle, transmission, clutch, flywheel, and release-system configuration, not by engine family or chassis code alone.
Key Features
- Exact SPEC manufacturer part number SCLS4AF40
- Exact part number and applications verified on the current SPEC manufacturer site
- Aluminum flywheel selected by exact crank pattern, clutch pattern, and transmission application
- Manufacturer-published product weight: 15 lbs
- Professional installation, correct fastener torque, release-system setup, and clutch break-in are required
Fitment
| Application Type | Transmission and clutch-system specific |
|---|---|
| Required Verification | Vehicle, engine, transmission, clutch design, flywheel pattern, spline, and release system |
Specifications
| Brand | SPEC |
|---|---|
| Manufacturer Part Number | SCLS4AF40 |
| Product Type | Flywheels |
| Fitment Type | Application verification required |
| Condition | New |
| Pricing Policy | Market audited, not MAP protected |
| Manufacturer Series | Aluminum |
| Product Weight | 15 lbs |
What's Included
One new SPEC flywheels package identified by manufacturer part number SCLS4AF40. Bearings, flywheels, hydraulic parts, fasteners, and installation tools are included only when the exact manufacturer package states they are included.
About SPEC
SPEC Clutch designs and manufactures performance clutch kits, multidisc assemblies, and billet flywheels in the United States for street, track, and competition applications.
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Frequently Asked Questions
How do I verify SPEC SCLS4AF40 before ordering?
Confirm the exact diameter, spline, crank pattern, clutch pattern, transmission interface, and all manufacturer notes. Do not select this component by appearance alone.
Does this require a specific flywheel or pressure plate?
Compatibility depends on the exact vehicle, transmission, clutch design, and flywheel pattern. Confirm the complete SPEC application before combining components.
What installation checks are required?
Inspect the flywheel surface, pilot and release bearings, hydraulic or cable release system, fasteners, bellhousing alignment, and rear main seal. Follow current SPEC torque and break-in instructions.
Installation
Follow the current SPEC instructions for part number SCLS4AF40. Confirm the flywheel surface, crank and clutch patterns, disc orientation, spline engagement, pilot support, release travel, bellhousing alignment, and fastener torque before operation. Complete the manufacturer-required break-in procedure before full-load use.
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