Whipple 3.75" 10-Rib 5-Bolt Supercharger Pulley 3.8L SCP-103750-5
Overview
The Whipple 3.75" 10-Rib 5-Bolt Supercharger Pulley is engineered for precise boost control and maximum belt stability on Whipple 3.8L supercharger applications. Machined from 6061-T6 billet aluminum and finished in a durable hard-coat black anodize, this pulley is built to withstand high RPM operation and extreme load conditions common in high-horsepower builds.
Each Whipple pulley features advanced lightweight pocketing to reduce rotating mass without compromising strength, along with an integrated belt-guard design that helps prevent belt wandering during aggressive acceleration or track use. The pulley is laser-engraved with its running diameter, making tuning changes fast and mistake-free.
Designed specifically for 10-rib belt systems, the 3.75" diameter pulley is commonly used to fine-tune blower speed and manage boost levels. As a general guideline, every .125" change in pulley diameter equates to roughly 1 PSI of boost, though actual results depend on engine configuration and airflow.
Performance Highlights
- Precision CNC-machined from 6061-T6 billet aluminum
- 3.75" running diameter for Whipple 3.8L superchargers
- 10-rib design for superior belt grip at high RPM
- 5-bolt mounting pattern
- Hard-coat black anodized for wear and corrosion resistance
- Lightweight pocketed construction reduces rotating mass
- Integrated belt guard helps prevent belt walk
- Laser-engraved diameter for easy identification
Quick Specs
- Part Number: SCP-103750-5
- Pulley Diameter: 3.75 inches
- Belt Type: 10-Rib
- Mounting: 5-Bolt
- Material: 6061-T6 Billet Aluminum
- Finish: Black Anodized
- Application: Whipple 3.8L Supercharger Only
FAQs
How much boost change does a 3.75" pulley typically make?
A common rule of thumb is approximately 1 PSI of boost per .125" pulley size change. Actual boost levels will vary depending on engine setup, airflow, and supporting modifications.
Can this pulley be used on other Whipple superchargers?
No. Whipple supercharger pulleys are application-specific. This pulley is designed exclusively for Whipple 3.8L superchargers and should not be used on other models.
Why Buy from Beefcake Racing?
Beefcake Racing works directly with Whipple Superchargers to deliver authentic, race-proven components backed by knowledgeable technical support. Whether youre dialing in boost for the street or the strip, our team is ready to help. Call 1-855-827-7223 or email sales@beefcakeracing.com.
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