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View compareHPI Racing 40 Tooth Spool Set – Optional Locked Diff Upgrade for RS4 Sport 3
HPI Racing 40 Tooth Spool Set – Optional Locked Diff Upgrade for RS4 Sport 3
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$26.90 USD
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$26.90 USD
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Description
Description
Overview
The HPI Racing 40 Tooth Spool Set is an optional drivetrain upgrade for the HPI RS4 Sport 3, replacing the standard differential with a locked spool for maximum drive efficiency. A spool delivers 100% power transfer to both wheels — ideal for drift, drag, and certain racing applications where consistent traction is more important than diff-style cornering behavior.
Precision-machined for smooth meshing and rugged construction, this upgrade is a popular choice for drift builders and racers wanting more direct power delivery.
Key Features
- Genuine HPI Racing optional upgrade
- Locked spool design (no differential action)
- 40-tooth gear count
- Precision-machined construction
- Direct fit for RS4 Sport 3
Performance Benefits
- Maximum power transfer to both drive wheels
- Predictable handling for drift applications
- Eliminates inside-wheel slip during launches
- Increased drive efficiency
Usage Notes
- Spools are best for drift, drag, and stadium racing
- Reduces cornering ability vs. standard differential
- Recommended for advanced drivers
- Use with appropriate tire compounds
Technical Specs
- Manufacturer: HPI Racing
- Part Number: 114436
- Tooth Count: 40T
- Type: Locked Spool
- Application: Optional Upgrade
Fitment
- HPI RS4 Sport 3
- HPI RS4 Sport 3 Hoonicorn
- HPI RS4 Sport 3 BMW M3 E30
- RS4 Sport 3 variants and licensed editions
What's Included
- 1x 40 Tooth Spool Set (RS4 Sport 3 Opt)
Summary
Lock in maximum drive efficiency with the HPI Racing 40T Spool Set for your RS4 Sport 3. The perfect choice for drifters and drag racers.
